answersLogoWhite

0


Best Answer

cold

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: An allele is dominant in a heterozygote when it is?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Biology

In a heterozygote the allele that does not affect the trait?

A heterozygote has the genotype of the dominant allele...therefore the recessive trait is the one that is masked.


What is dominant expression?

Well....its the first thing you noticed about a person -Ms. Pouge(: englishh claasss


Two dominant alleles are expressed at the same time?

The alleles are not always both expressed.Take the simplest example, a case when there are only two alleles for a trait, R and r. When the organism is a heterozygote, meaning that it has both alleles with a genotype of Rr, only the phenotype carried by the dominant allele, the R, will be expressed. The dominant allele masks the phenotype of the recessive allele. A case in which only the dominant phenotype is expressed in a heterozygote is a case of complete dominance.*Cases where the dominant allele does not completely mask the recessive allele are cases of incomplete dominance and co-dominance.In incomplete dominance, the dominant allele has some effect on the recessive allele, but not a full effect. This results in a third phenotype in the population. Think red and white flowers leading to pink flowers.In co-dominance, the dominant allele has as much effect on the phenotype of the organism as the recessive allele. Think red and white flowers now leading to red and white streaked flowers.


What is allele masked by the dominant allele?

The Allele That Is Covered By The Dominant Allele Is The Recessive Allele.


What happens when an allele is dominate or recessive?

Well, a dominant allele carries dominant traits from parents to offspring. An example of a dominant trait is brown hair and brown eyes because these traits are most likely to show up on a human than a recessive allele. A recessive allele may carry a recessive trait from parents to offspring such as blonde hair and blue eyes, these are uncommon because they are recessive traits.

Related questions

What is an expressed allele in a heterozygote?

Dominant allele as opposed to recessive allele.


In a heterozygote the allele that does not affect the trait?

A heterozygote has the genotype of the dominant allele...therefore the recessive trait is the one that is masked.


Is the allele for retinal blindness dominant?

I think it is dominant in heterozygote form


What is a person who has one recessive allele for a trait and one dominant allele for the same trait and is able to pass in the trait on to their offspring?

That is heterozygous. Some scientist call these "hybrids"(no joke)The person is heterozygous for that trait and will have the dominant phenotype.An organism with both a dominant and recessive allele for a specific trait is called an heterozygote. They are heterozygous for this trait.


When the dominant allele does not completely mask the effect of the recessive allele in the heterozygote it is called polygenic dominance incomplete dominance dominance corecessive codominance?

Incomplete dominance.


What allele does affect the trait in a heterozygote?

The recessive allele.


What allele is expressed in a heterozygote?

The allele not expressed is referred to as a recessiveallele.


What is dominant expression?

Well....its the first thing you noticed about a person -Ms. Pouge(: englishh claasss


Allele not expressed in heterozygote?

"recessive"


Two dominant alleles are expressed at the same time?

The alleles are not always both expressed.Take the simplest example, a case when there are only two alleles for a trait, R and r. When the organism is a heterozygote, meaning that it has both alleles with a genotype of Rr, only the phenotype carried by the dominant allele, the R, will be expressed. The dominant allele masks the phenotype of the recessive allele. A case in which only the dominant phenotype is expressed in a heterozygote is a case of complete dominance.*Cases where the dominant allele does not completely mask the recessive allele are cases of incomplete dominance and co-dominance.In incomplete dominance, the dominant allele has some effect on the recessive allele, but not a full effect. This results in a third phenotype in the population. Think red and white flowers leading to pink flowers.In co-dominance, the dominant allele has as much effect on the phenotype of the organism as the recessive allele. Think red and white flowers now leading to red and white streaked flowers.


When phenotype of both homozygous are produced in the heterozygote they are called?

Codominance is what it is called. That is when neither allele is completely dominant over the other.


When on e allele of a gene masks the presence of the other allele what form is masked?

The recessive allele.