What is a dominant vs recessive allele?

Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.

What is a semi dominant allele?

Definition. Semidominant allele is one of a series of terms applied to the phenotypic effect of a particular allele in reference to another allele (usually the standard wild-type allele) with respect to a given trait.

What does it mean to be dominant or recessive?

(In genetic terms, a dominant trait is one that is phenotypically expressed in heterozygotes). A dominant trait is opposed to a recessive trait which is expressed only when two copies of the gene are present. (In genetic terms, a recessive trait is one that is phenotypically expressed only in homozygotes).

What is the scientific definition of recessive allele?

A recessive gene or allele is one in which the effect is not tangible, or is masked by the effects of the dominant gene. The recessive trait may be expressed when the recessive genes are in homozygous condition or when the dominant gene is not present.

What are some examples of dominant alleles?

Dark hair is dominant over blonde or red hair.

What is the difference between dominant and recessive traits?

The main difference between dominant and recessive genes is that the dominant genes always express the dominant trait whereas the recessive genes express the recessive trait. Furthermore, the dominant genes are more likely to pass to the future generation while the recessive allele is less likely to pass to the future generation.

What does it mean if a trait or allele is dominant?

An allele is dominant if it masks the presence of other alleles. This means that if an organism has one allele of this type, it will show the characteristics of this trait.

What are some examples of dominant or recessive genes?

Dominant gene. The dominant gene is one that is present both in the mother and the father and therefore appears twice in the genotype of the children.