If an allele for a particular trait is NOT expressed at all when another allele for the trait is present the allele is .?

1. What is an allele that isn't expressed?
2. What is it called when there are two different alleles for a trait?
3. What is penetrance and expressivity?
4. When both alleles are expressed in the heterozygous state?
5. How is genotype expressed?
6. Which allele is not expressed in a heterozygote?
7. Are both alleles expressed?
8. When a trait is only expressed in the presence of two identical alleles The genotype is?
9. Why are recessive allele not expressed?
10. Which type of gene is expressed only in the absence of a dominant gene?
11. Can a recessive gene be expressed?

What is an allele that isn't expressed?

The allele that isn't expressed is called the recessive allele.

What is it called when there are two different alleles for a trait?

An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.

What is penetrance and expressivity?

Penetrance is used to describe whether or not there is a clinical expression of the genotype in the individual. Expressivity is the term that describes the differences observed in the clinical phenotype between two individuals with the same genotype.

When both alleles are expressed in the heterozygous state?

Closely related to incomplete dominance is codominance, in which both alleles are simultaneously expressed in the heterozygote.

How is genotype expressed?

The genotype is expressed when the information encoded in the genes' DNA is used to make protein and RNA molecules. The expression of the genotype contributes to the individual's observable traits, called the phenotype.

Which allele is not expressed in a heterozygote?

An allele that is not expressed in the heterozygous condition is (d) recessive. Each variation of a gene sequence is an allele.

Are both alleles expressed?

In most cases, both alleles are transcribed; this is known as bi-allelic expression (left). However, a minority of genes show monoallelic expression (right). In these cases, only one allele of a gene is expressed (right).

When a trait is only expressed in the presence of two identical alleles The genotype is?

Homozygous also refers to a genotype consisting of two identical alleles of a gene for a particular trait.

Why are recessive allele not expressed?

Recessive alleles only express their phenotype if an organism carries two identical copies of the recessive allele, meaning it is homozygous for the recessive allele. ... Therefore, it is impossible to identify the genotype of an organism with a dominant trait by visually examining its phenotype.

Which type of gene is expressed only in the absence of a dominant gene?

Recessive alleles will only be seen in the absence of the dominant alleles.

Can a recessive gene be expressed?

A recessive gene is only expressed when an organism has two recessive alleles for that gene. This is also known as being homozygous recessive. If an organism has one dominant and one recessive allele, it will show the dominant trait.