An allele that exerts its phenotypic effect in a heterozygote.Group of answer choicesrecessivedominant
Question
An allele that exerts its phenotypic effect in a heterozygote.
Group of answer choices
- recessive
- dominant
Solution
The correct answer is dominant.
In genetics, an allele that expresses its phenotypic effect even when only one copy is present (as is the case in a heterozygote) is referred to as a dominant allele. This means that if an individual has one dominant allele and one recessive allele for a particular gene, the dominant allele will determine the phenotype of the organism. Conversely, a recessive allele only manifests its effect when an individual has two copies, meaning both alleles are recessive. Hence, the presence of a dominant allele in a heterozygote will overshadow the effect of a recessive allele.
Similar Questions
It is observed in the phenotype when homozygous.Group of answer choicesrecessive alleledominant allele
A heterozygous parent is equally likely to contribute the dominant or the recessive allele to an offspring.Group of answer choicesFalseTrueNext
It requires only one affected allele in order to express that trait.Group of answer choicesautosomal dominant disorderautosomal recessive disorderNext
The allelic make up of an individual is referred to as its _____.Group of answer choicesgenotypephenotypeNext
Alleles _____.Group of answer choicesaffect the same trait.are alternate forms of a gene.have the same position on a pair of chromosomes.Next
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.