Q: In autosomal dominant inheritance only one "affected" what is necessary to result in an "affected" phenotype?


Read this paragraph and choose the correct option from the provided answers:

Autosomal Dominant Inheritance. Only one “affected” allele is necessary to result in the “affected” phenotype. For a genetic disease inherited in this manner, only one mutant allele is necessary to result in the phenotype. Achondroplasia (discussed later) is an example of a dominant disorder. Both homozygous and heterozygous individuals will show the phenotype. Homozygous achondroplasia is usually a lethal condition.

 Choices:

- molecule

- trait

- cells

- allele


A:
allele