How were researchers belyaev and trot able to produce domesticated foxes?

Answers

Answer 1
Belyaev and Trot were well-known researchers who worked together to produce domesticated foxes. It began when Belyaev got 30 males and 100 females (vixens) from a commercial fur farm. This was important since these foxes were already tamer than wild ones since they had been subject to human contact and raised in the commercial fur farm. The foxes were placed in individual cages, had minimal contact with humans and were never trained. After a female gave birth, the babies would stay with her until they reached 3 months, and then placed in individual cages. Then the tests began to determine the tameness of the foxes. The person conducting the experiment would hand feed the foxes from when they were 1 month old until they were 6 months old. The foxes would also be petted and stroked during the feeding time. When the foxes were 7 months old, and able to breed they were put into these three classes; most domesticated, somewhat domesticated, and least domesticated. The foxes were being bred for this experiment for more than 40 years. Over time, the foxes became eager for human contact, they would even whimper for attention, and sniff and lick humans just as a dog would do. These foxes developed different coats and also critical sensory developments mush faster than a wild fox could. The foxes that were raised like this around humans also opened their eyes earlier, and over time their skull changed into a more feminine skull. They started the experiment because Belyaev noticed how over time domesticated dogs and other animals had changed over the years such as their hair being curly, tails were shorter, etc. In 2010, there were approximately 45,000 offspring from the original foxes he had taken from the commercial fur farm. In that year, 100 of the foxes are eager to please, docile, unmistakenly docile, and eager to please humans. 

Related Questions

A nurse is caring for an infant who has just undergone myelomeningocele repair. what should the nursing plan of care include

Answers

If a nurse is caring for an infant who has just undergone myelomeningocele repair, his or her care plan should be detailed and precise, including medication charts if any, correct wound care, scheduled doctor visits, scheduled feedings, hygiene routine.

While taking care of myelomeningocele infected infect, the nurse should undergo the plan of care:

The nurse should have a medication chart. The nurse should schedule doctor visits. The nurse should schedule feeding. The nurse should take care of proper hygiene routine.

Further explanation:

Myelomeningocele is a severe disease of spina bifida. The infant gets infected when the spinal cord nerves protrude from the opening of the spine. These nerves are exposed to the outside. It is treated or repaired within the uterus through an incision. The infant who is suffering from this disease born by a cesarean method.

The children with this disease might experience partial or complete paralysis. They require a device like braces, wheelchairs and crutches. The nurse should take care of physical therapy, which is essential for muscle strengthening.

There is a probability that the infant might have an allergy to latex (natural rubber); the nurse should avoid exposing him or her to any latex product.

Learn More:

Learn more about the treatment of eukaryotic cell with a drug https://brainly.com/question/10767798 Learn more about the proteins synthesis in a cell https://brainly.com/question/1420458 Learn more about an exchange of gases by blood cells https://brainly.com/question/1213217

Answer Details:

Grade: High school

Subject: Biology

Chapter: Central Nervous System.

Keywords:

Nurse, myelomeningocele, spina bifida, spinal cord, nerves, uterus, incision, cesarean, paralysis, physical, latex, infant, allergy.

Controlling what enters and leaves the cell in an important function of the

Answers

the outer boundary of cytoplasm is the answer

Knuckle-like process at the end of a bone is called a:

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Knuckle-like process at the end of a bone is called a condyle.
Condyle refers to a round prominence at the end of a bone, usually forming a joint between two bones. It can be found on the femur (in the knee joint), on the tibia (in the knee joint), on the humerus (in the elbow joint), on the mandible (in the temporomandibular joint), and on the occipital bone (in the atlanto-occipital joint). 
Final answer:

A knuckle-like process at the end of a bone can refer to a 'styloid process', an elongated bony projection such as those seen on the distal radius or ulna, or the epiphysis of the phalanx bones of the thumb or fingers that form the knuckles.

Explanation:

A knuckle-like process at the end of a bone is commonly referred to as a styloid process. The term 'styloid' is derived from the Greek word for 'pillar', alluding to its elongated, column-like shape. The most familiar styloid processes are those located at the distal ends of some of the long bones in the human body. For instance, the styloid process of the radius is a pointed projection located on the lateral end of the distal radius, while the styloid process of the ulna is a short bony projection found on the medial end of the distal ulna. These processes serve as attachment points for ligaments and muscles.

However, the term 'knuckle-like' may also refer to the epiphysis of the phalanx bones of the thumb or fingers, which form the knuckles of the hand. The phalanges are numbered from 1 to 5 starting from the thumb, and their distal ends contribute to the knuckle contour when making a fist.

Learn more about styloid process here:

https://brainly.com/question/33444246

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Self-esteem takes on a hierarchical structure in __________.
a.toddlerhood
b.preschool
c.middle childhood
d.adolescence

Answers

Final answer:

The hierarchical structure of self-esteem typically becomes evident during adolescence. This time is marked by an increased awareness of personal strengths and weaknesses, resulting in a more complex hierarchical structure of self-esteem

Explanation:

Self-esteem is a fundamental aspect of self-perception, playing a pivotal part from early childhood to adulthood. The hierarchical nature of self-esteem is usually noticeable in adolescence. This age period is characterized by an increased understanding of the self and society's expectations. Adolescents begin to create a more complex, hierarchical structure of self-esteem as they become more aware and critical of their strengths, weaknesses, and variations in their performance across different domains like schoolwork, sports, peer interactions, and family relationships.

Learn more about Self-esteem here:

https://brainly.com/question/1578469

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Once an rna molecule has been made from dna, it enters the cytoplasm of the cell where it is used by the cell to produce a

Answers

Once an RNA molecule has been made from DNA, it enters the cytoplasm of the cell and is used by the cell to produce a protein.

RNA is synthesized from DNA in the nucleus by a process known as transcription. Thereafter, the RNA undergoes some processing before it is transported to the cytoplasm.

In the cytoplasm, the RNA binds to the ribosome and is used to synthesize proteins in conjunction with the transfer RNA.

More on protein synthesis can be found here: https://brainly.com/question/14274397

Which is the number of characteristics that define a living thing? 6 3 4 8

Answers

the correct answer is 6

Which describes one of the ways proteins behave in facilitated diffusion?

A)They change membranes.

B)They use ATP.

C)They change shape.

D)They create channels..

Answers

they create channels

Answer:

Option D is correct.

D)They create channels.

Explanation:

Facilitated diffusion is the movement of molecules across the cell membrane of a cell through carrier proteins and protein channels. IN Facilitated diffusion no energy is required so it is called passive transport.

The molecules that can not directly diffuse across the membrane, they are transported through special channels and carrier proteins.


This tissue contains chondrocytes along with thick bundles of collagen fibers. a location for this tissue is

Answers

Cartilage. Cartilage primarily tissue consists of chondrocytes, specialized cells that form a matrix of collagen and other proteins. Cartilage tissue is found at joints between long bones, and also comprises other structural areas in the body such as vertebrae, bronchial tubes, the outer ear, the nose, and in between ribs.

Answer:

B

Explanation:

Any statements about optimal population are inevitably culturally determined.
a. True
b. False

Answers

True. The optimum statements made about a population, given by its inhabitants or foreigners is linked to the culture and tradition that each region has, the people have mentality and thoughts according to their beliefs about the population and support the good ideas about a certain region and its inhabitants. Culture influences as a means of attitudes and determine the behavior of people and reflects their thoughts and opinions about their population and other populations.

Flaccid bladder dysfunction is a neurogenic disorder of the bladder in which bladder emptying is impaired

Answers

The statement above is TRUE.
Flacid bladder dysfunction is a neurogenic disorder of the urinary bladder in which emptying of the bladder is impaired as a result of neurologic damage that emanate from internal or external trauma, injury or disease. The principal symptoms of this condition is overflow incontinence. Other symptoms are: urge incontinence, retention, frequency, etc. The condition typically results in erectile dysfunction in males. The general treatment for this catheterization.

Flaccid bladder dysfunction is a neurogenic disorder often affecting elderly individuals due to physical and neurological conditions which can lead to symptoms such as urinary retention and difficulty in emptying the bladder.

Flaccid bladder dysfunction can lead to urinary retention, and patients may have difficulty starting urination, experience a weak or interrupted flow of urine, and feel the need to urinate frequently, especially at night. Monitoring fluid intake and providing assistance in daily activities can help manage the symptoms. This condition is often seen in elderly individuals due to various physical and neurological conditions such as Alzheimer's and Parkinson's disease.

Doctors often perform urine cultures to identify any causative agents that might contribute to the condition.

Difficulty in starting urinationWeak or interrupted flow of urineFrequent urination, particularly at nightUrinary retention

Treatment and Management Strategies

Monitoring fluid intakePeriodic catheterizationRegular assistance in daily activitiesUrine culture testing to identify causative factors

Complete question:

Explain why Flaccid bladder dysfunction is a neurogenic disorder of the bladder in which bladder emptying is impaired.

Movement of a bone toward the midline of the body is known as

Answers

The movement of a bone toward the midline of the body is known as an abduction.
abduction is ur answer. I Think!!!!

Will has dramatically gained weight since he sustained a head injury in an automobile accident. damage to which nucleus of the hypothalamus might account for will's weight gain?

Answers

The correct answer is ventromedial nucleus of the hypothalamus. This is the correct answer because the ventromedial nucleus is responsible for hunger, food intake, obesity and energy homeostasis. Therefore damage to this part of the brain may have altered Will's hunger and food intake leading to the weight gain.

Oxygen comprises about ________ percent by weight of earth's continental crust

Answers

Hello There!

Oxygen compromises about 47 percent by weight of earth's continental crust.
Another important element is silicon.
Continental crusts are older and less dense when compared to the oceanic crust.

Hope This Helps You!
Good Luck :) 

- Hannah ❤

A male and a female mouse are each from pure-breeding albino strains. they have a litter of 10 pups, all of which have normal pigmentation. the f1 pups are crossed to one another to produce 56f2 mice, of which 31 are normally pigmented and 25 are albino.

Answers

You are forgetting the question but I can help you understand the exercise.

For this exercise it's important to know that there are more than one gene that causes albinism. In this exercise, one of the parents is albino because of one gene( gene A) and the other parent is albino because of another gene( gene B)
Albinism only happens if it's inherited both recessive allelles.
The male and female mouse follow those rules, so the cross between them is:
AAbb x aaBB

All their pups, the generation F1, is:AaBb
Since the disease is recessive (that means: aa), they don't have albinism.

After they cross each other: AaBb x AaBb (see the image attached)


Final answer:

The scenario illustrating a cross between two albino mice leading to both normally pigmented and albino offspring in the F2 generation underscores the concept of epistasis in genetics, where the gene responsible for pigment production masks the effect of the gene controlling the type of pigmentation. This results in a 9:3:4 phenotypic ratio, following Mendelian inheritance patterns for dihybrid crosses involving epistatic interactions.

Explanation:

The question involves understanding the genetics of coat color in mice, specifically the concepts of pure-breeding, epistasis, and phenotypic ratios which are quintessential in Mendelian genetics and inheritance patterns. In this scenario, both parents are albino mice from pure-breeding strains, indicating they are homozygous for the recessive allele (“cc”) that prevents pigment production, irrespective of their genotype at the agouti locus (“A” locus). When their F1 offspring, which are all normally pigmented, are crossed with each other, the appearance of both normally pigmented and albino mice in the F2 generation can be explained by epistasis, where the gene for pigment production (“C” gene) is epistatic to the gene controlling the type of pigmentation (“A” gene). The observed phenotypic ratio closely resembles the expected Mendelian ratio of 9:3:4 for a dihybrid cross involving epistasis, where 9 represents normally pigmented mice (either agouti or solid-colored), 3 represents solid-colored (non-agouti) mice with regular pigment production, and 4 represents albino mice, highlighting the masking effect of the “c” allele over the “A” allele regardless of its state (“AA”, “Aa”, or “aa”).

What type of candies do some blacks believe are helpful in diabetes?​?

Answers

Peppermint candies. Peppermint is a herb found in Europe and Asia, and is scientifically known as Mentha piperita, and is today it is cultivated all around the world.

What is the most common type of cancer diagnosed in males?

Answers

I’d say that it’s prostate cancer.

On reviewing the medical reports of a postpartum patient, the nurse finds that the patient has homans' sign. what does the nurse interpret from this finding?

Answers

Homans' sign is an assessment test used to determine whether the patient has VTE. Presence of Homans' sign indicates that the patient may have VTE. Uterine atony can be assessed by palpating the uterine fundus. Hypotensive shock can be assessed by checking the patient's vitals. Mastitis can be assessed by the examining the patient's breasts.

What can be determined about the top layer of sedimentary rock?

Answers

the most recent layer that the rock is made of if thats helpful 
well when they say the layer is the most recent it means that the top of the rock is younger than the bottom so if you where to list it on a number line the oldest(bottom) world go to the left and to the right it would grow to the youngest(newer) oldest to youngest.


Hope I helped

Which situation would deplete freshwater?

A. Water demand is greater than its renewal or recharge rate.
B. Precipitation is collected and stored for later use.
C. Precipitation relieves drought conditions.
D. Water use is less than its supply.

Answers

Answer:

The correct answer is A.

Explanation:

To deplete freshwater consumption of the water must be greater than the renewal rate. If the precipitation collected it does not mean it depleted, it can be still used later on. If precipitation relieves drought also doesn't mean water is gone, water would be still accessible by using wells and it is stored underwater. If water is less than supply than there will be no problem at all. So if water demand is higher than water renewal the opposite is true and freshwater supplies would finish.

Answer:

yes is A

Explanation:

for apxs

Uv waves and gamma waves can cause dna mutations that result in various forms of cancers. explain why using the terminology found within the passage. give one example of the damage caused by one of these waves.

Answers

Uv Waves and Gamma waves result in various forms of cancer due to mutations that have happened over time and resulted in the cells trying to divide so much that it gets out of control. Uv waves cause damage through dna mutations with one example being when one gets sunburned. When your skin peels from being sunburned, that dead skin couldn't survive after so many mutations that it died.

If parent 1 tt crosses with parent 2tt what percentage

Answers

there would be a 50 percent

In the southern european plains, a species of flower comes in two colors, purple and pink. when pink flowers are most common in a field, bees visit and pollinate the purple flowers more often, and vice versa. this switching of pollinator preference will result in __________.

Answers

It will result in Negative frequency-dependent selection.

Frequency-dependent selection is when the fitness of a phenotype depends on the frequency of the other phenotype in the population. In this case is negative frequency-dependent selection, because the fitness of a phenotype(pink) decreases as it becomes more common.



By controlling the substances that enter and leave the cell, the cell membrane helps maintain homeostasis in the cell. True or false

Answers

True: 
Cell membrane: This cellular structure helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

Answer:

The correct answer is- True.

Explanation:

Homeostasis the process of maintaining the steady physio-chemical environment in the body. Body cells maintain homeostasis by controlling the substances that enter and leave the cell with the help of the plasma membrane.

The plasma membrane is semi-permeable in nature, therefore, it allows only selective molecules to be transfer in the cell and outside the cell. Plasma membrane maintains the homeostasis by managing several factors.

It maintains a higher concentration of ions like potassium into the cell, maintains the osmotic balance of the cell by osmosis of water molecule in and out of the cell. Maintains the ionic balance of both inside and outside the cell. Therefore, the correct answer is true.

According to sieyes what is the difference between the rights of a passive citizen and an active citizen

Answers

PASSIVE CITIZENS: Were those who had no property rights or voting. They were entitled to protection by law with relation to their belongings and their liberty, but had no say in the making of governmrnt bodies. ACTIVE CITIZENS: Numbered around four million men. They were adults who could use reason. They needed to speak French and have been a resident for more than one year. They had a stake in the government bodies.

A hospitalized child has a pulse oximeter attached to his finger. what interventions would the nurse implement in caring for this client?

Answers

A pulse oximeter is a common device in all hospitals and in a Doctor's office. This reads the oxygen saturation in an adult and child. It can be attached to the finger or even to a patients earlobe. The intervention that the nurse would implement is to record the patient's oxygen level and inform a DR if the reading drops to 90 or below. The nurse will also need to make sure the child does not move the oximeter off of his/her finger. The device can be attached to any finger, and if for some reason, the child is moving to much to get an accurate reading, it can be attached to a toe also.

How does a cell transport materials across the cell membrane?

Answers

Depednign on what the cell is trying to transport there could be a variety of ways for the cell to transfer materials.
If the item is small and np then it can go through the lipid bilayer.



Simple diffusion and facilitated diffusion are passive transport meaning the cell does not need energy to transfer the membrane

and active diffision means they need to spend energy.

you need transmembrane protiens to move things inside the cell




__________ is characterized by excessive/constant worry, restlessness, irritability, and disturbed sleep.

Answers

GENERALIZED ANXIETY DISORDER (GAD) is characterized by excessive/constant worry, restlessness, irritability and disturbed sleep. It is a mental disorder where anxiety is an important feature. It leads to constant worrying and fatigue due to anxiety. GAD can be of two types primary GAD and secondary GAD.

What do pharmacy technician, emergency dispatcher, and administrative personnel careers have in common? 

Answers

They all are college required careers.. They are jobs that involve helping people

Answer:

They all require people to become licensed and certified in order to get a career.

Explanation:

Pharmacy technician, emergency dispatcher, and administrative personnel are top-level professions that require quality and specialized technical knowledge. These professions deal directly with humans and are very important to today's society, so people who want to work in any of the three will need to be licensed and certified to pursue a career in these areas.

Vitamin k serves as ano ________ to various enzymes involved in the coagulation of blood. select one:
a. inhibitor
b. carrier
c. coenzyme
d. antagonist

Answers

The answer is C. Coenzyme

Some micronutrients, such as vitamins e and c, can function as antioxidants in that they are able to:

Answers

 Some micronutrients, such as vitamins e and c, can function as antioxidants in that they are able to neutralize free radicals. Radical are highly unstable molecules  produced in our body when we are exposed to toxins. Vitamins C and E, carotenoids (including beta-carotene), and the mineral selenium are all powerful antioxidants found in food.
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