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Genetic trait that is expressed when it's allele is homozygous or heterozygous?
Wiki User
∙ 12y ago
The complete expression of both alleles (i.e. for example, a black and white cow), is known as co-dominance, when each allele is equally dominant over the other. However, both alleles may be expressed in the form of an intermediate as well (i.e. white and red alleles forming a pink intermediate for flower petals), known as incomplete dominance, when neither allele is completely dominant over the other.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoYou might be thinking of co-dominance. This is where roan horses come from. They have white hair and red hair and all of the strands are mixed together, giving it a strawberry appearance. The important thing to remember is that the colors didn't mix (then the horse would be pink). Each strand of hair is individually colored either white or red.
Wiki User
∙ 12y agoIf someone is homozygous or heterozygous for a trait they will express the dominant trait.
Emely Alcantara
Wiki User
∙ 12y agoWhen both alleles are expressed in a heterozygous organism, such as when you have blood type AB, it is called codominance.
Wiki User
∙ 13y agoCoDominance
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What is the type of allele that only effect the phenotype in the homozygous chromosome?
Recessive. Dominant alleles are expressed in both homozygous and heterozygous individuals (DD or Dd), but recessive alleles are only expressed in homozygous individuals (dd).
What is an allele that produce a trait in the heterozygous condition is?
homozygous
What is the difference between a dominant and recessive allele?
Dominant is an allele that can be expressed in a heterozygous individual (ie. Bb) or homozygous dominant (ie. BB). Recessive on other hand are traits that will only be expressed in a homozygous recessive (ie. bb) condition. Under normal circumstances, dominant alleles are the ones expressed in the phenotype, while the recessive allele is not. For example (an extremely simplified example) an heterozygous individual for eye color. (genotype Bb), has one dominant allele, 'B', and one recessive allele, 'b'. Given that B is for brown eyes, and b is for blue eyes, that individual's phenotype would be expressed as brown eyes (and be recessive for blue eyes). Organisms receive one allele for each trait from each parent, thus you have two alleles for each trait.
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.
What gene is masked if it is paired with a dominant gene?
The different forms of a gene are called alleles. In Mendelian genetics, a gene has a dominant allele and a recessive allele. The dominant allele masks the recessive allele if present. So there are two possible dominant genotypes: homozygous dominant, in which both dominant alleles are present; and heterozygous, in which one allele is dominant and the other allele is recessive. The only way to express a recessive trait is to have the homozygous recessive genotype.
What are the circumstances under which dominant alleles will be expressed?
A dominant allele will be expressed when an allele pair is homozygous or heterozygous dominant.
What is the type of allele that only effect the phenotype in the homozygous chromosome?
Recessive. Dominant alleles are expressed in both homozygous and heterozygous individuals (DD or Dd), but recessive alleles are only expressed in homozygous individuals (dd).
Is eye color a homozygous recessive genetic disorder?
Blue eyes - homozygous recessive Brown eyes - homozygous dominant Brown eyes with one brown allele and one blue allele - heterozygous
Is an allele that produces a trait in the heterozygous condition recessive?
No. A recessive allele will not be expressed phenotypically in the heterozygous state. A recessive allele can only be expressed phenotypically in the homozygous state.
What genotype will be produced by a heterozygous?
The trait that would be expressed in a heterozygous genotype would be the dominant trait. If one allele is dominant then it will be expressed.
What is an allele that produce a trait in the heterozygous condition is?
homozygous
How do you know a homozygous trait from a heterozygous trait?
A homozygous trait is controlled by only one kind of allele, while a heterozygous trait is controlled by multiple allele types.
What is the alternative forms or genetic information for a trait are called?
This is generally the definition of an allele. An allele is an "alternate form of a gene". For each gene there may be many alleles. For example (simplistically) the gene which makes the pigment in your eyes (ie which gives you your eye colour) has a brown, green and blue allele. On each of the two chromosomes (one from your mother and one from your father) you can have either the same allele (homozygous) or a different allele (heterozygous). In the case of a heterozygous gene the dominate allele is expressed. In some cases (co-dominance) both alleles are expressed.
What is dominant recessive?
There is dominant and there is recessive. There is no dominant recessive. A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed when the genotype is homozygous recessive (rr).
What is the heterozygous for the A allele?
Heterozygous Aa Homozygous AA, aa
Is AA an homozygous or an heterozygous?
AA could be either homozygous or heterozygous, depending on whether the individual inherited the same allele (A) from both parents (homozygous) or different alleles (Aa) from each parent (heterozygous).
What is it when you have a gene pair that consist of two dominate alleles and two recessive alleles?
The name of the gene pair that consists of a dominant and recessive allele, i.e. (Xx) will be a heterozygous allele. In this situation, the characteristics of the dominant characteristic will mask that of the recessive allele. People have have a heterozygous genotype may be carriers for diseases that reside on the recessive allele.
