1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
frutty [35]
3 years ago
13

What is the definition of epistasis?

Biology
1 answer:
ollegr [7]3 years ago
6 0

The definition of Epistasis in gene biology is Choice D: when the allele of one gene masks the phenotype of another gene

Definition:

When the phenotypic effect of alleles at one gene are masked by alleles of another gene.

In essence, a gene is said to be epistatic when its presence suppresses the effect of a gene at another locus.

It is important to know that Epistatic genes are often called inhibiting genes because of their effect on other genes which are described as hypostatic.

Additionally, there are six common types of epistasis gene interactions:

  • Dominant

  • Dominant inhibitory,

  • Duplicate dominant,

  • Duplicate recessive,

  • Polymeric gene interaction,

  • Recessive.

Read more:

brainly.com/question/24167831

You might be interested in
Where do scientist obtaint the majority of their modern knowledege about the history of life
Montano1993 [528]

Answer:

fossils

Explanation:

7 0
3 years ago
What are the two<br> processes in which<br> almospheric oxygen<br> is absorbed?
nikitadnepr [17]

Answer:

respiration and decomposition

Explanation:

Respiration is when animals breathe in oxygen and use it to produce energy, releasing carbon dioxide and water as by-products. In simpler terms, it is the act of breathing.

7 0
2 years ago
How is it possible for one twin to get skin cancer but the other one doesn´t
tia_tia [17]

Looking at most newborn twins squirm contentedly in their cribs, you'd never guess that some were recently in peril. That's because carrying multiples raises the risks that a woman can suffer complications before she actually delivers.

Many twins are miscarried early in the pregnancy, often before a woman even knows she's pregnant. As reported in the International Journal of Fertility, only about one in eight embryos that starts as a twin is born as a twin. If they do survive, twins are usually born healthy. However, they are still more likely than other babies to have birth defects or to be born prematurely or underweight.

Carrying twins can be hard on you, too. You'll be more likely to develop pregnancy-related high blood pressure or diabetes. And there's a greater likelihood you will have a cesarean section when you deliver.

If you're carrying twins, some simple lifestyle changes and good prenatal care may help you reduce the likelihood of the following complications.

Low birth weight

Because they have to share nutrients and living space, newborn twins tend to be smaller than single babies. Even full-term twins often weigh less than 5-1/2 pounds each, making them vulnerable to a variety of health problems. You can help your babies reach a healthy size by making sure you put on enough weight during pregnancy. Try to eat 300 calories more each day than you would if you had a single baby (about 2,700 calories in total). If you had a healthy weight before pregnancy, you should aim to put on about 35 or 45 pounds.

Unequal size

Twins don't always share equally. In roughly 30 percent all twin births, one baby will be larger than the other. Some studies suggest that if one of your babies is at least 25 percent heavier than the other, one or both of them may be more likely to have breathing problems or need intensive care. Your doctor will track the growth of both your babies throughout your pregnancy. The first signs of unequal growth usually appear in the third trimester.

Twin transfusion syndrome

Twin transfusion syndrome poses a dangerous threat to identical twins who share a single placenta. It's normal for such twins to exchange blood during a pregnancy. But in about 20 percent of cases, one twin starts pumping large amounts of blood to the other twin, putting both of them at risk. In severe cases, the twin receiving the extra blood may develop heart failure while the other twin becomes dangerously anemic. Early diagnosis and treatment can slow the abnormal blood flow and lower the risk of complications.

Birth defects

Birth defects are common in twins, especially identical twins. Taking folic acid before and during pregnancy can help prevent neural tube defects. As reported in the medical journal The Lancet, however, about 10 percent of all identical twins are born with a birth defect such as a heart problem, a shortened limb, a club foot, or a dislocated hip (the conditions listed are linked to having less space in the uterus and would not be affected by folic acid.) Most of these conditions are treatable, however.

Risks to the mother

Your doctor will check you regularly throughout the pregnancy for signs of high blood pressure or diabetes. When detected early, both of these conditions can be controlled before they have a chance to threaten your pregnancy.

Special care

Carrying twins means you'll probably get extra attention from your doctor throughout your pregnancy. The doctor may suggest cutting back on activities between the 20th and 30th week of pregnancy, even if you haven't had any signs of labor. Many physicians also recommend an extra monitoring check on the babies' heart rate and movement, such as an ultrasound or nonstress test. A biophysical profile, which checks on heart rate, movement, and the amount of amniotic fluid in your body, might also be indicated. If you do go into labor prematurely, your doctor may suggest drugs to stop the labor or use corticosteroids to speed up the development of the babies' lungs.

It's possible that you may be able to deliver twins vaginally. But if the labor is difficult, the birth canal is too narrow, or one or both of the infants is in the breech position, you may have to undergo a c-section, in which the babies are delivered through an incision in your uterus. Talk to your doctor about what you can do to prepare for delivery.

Twins are a special challenge, both before birth and after. For now, your job is to stay healthy and get top-quality prenatal care. Two important people are counting on you.

Does this help lol :D

4 0
2 years ago
Read 2 more answers
What is the difference between ice and snow.
n200080 [17]

Answer:

Though ice and snow are both made up of water, there is a difference between the two. Snow is nothing but the frozen atmospheric vapour which falls in winters on earth as light flakes whereas ice is simply frozen water.

5 0
3 years ago
Read 2 more answers
Old thermometers contained very small amounts of mercury. The mercury in the photo has a melting point of -38°C. What can u conc
babymother [125]

Answer:

The thermometer can not be used to measure very low temperature

Explanation:

Mercury-in-glass thermometer is one of the types of liquid-in-glass thermometers.

Given the very melting point of mercury, it is unsuitable to attempt to use this thermometer for very low temperature measurement.

Hence, from the melting point of mercury, this thermometer can not be used to measure very low temperature.

6 0
3 years ago
Other questions:
  • Inspiratory capacity is ________. A. functional residual capacity B. air inspired after a tidal inhalation C. the total amount o
    11·1 answer
  • Which best describes red blood cells?
    8·2 answers
  • Define pathogenicity and virulence.
    5·1 answer
  • A nurse is providing discharge instructions for a client with a diagnosis of gastroesophageal reflux disease (gerd). what should
    13·1 answer
  • If fish can change their gender, then what other animal can change its gender?
    13·1 answer
  • Why is water so important?
    12·2 answers
  • Strengths that I developed​
    10·1 answer
  • List the biotic and abiotic factors in this image
    6·1 answer
  • How do the body systems work together to help the body maintain homeostasis?
    12·2 answers
  • On Which ends is the phosphate group on a nucleotide
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!