Question

multiple select question
select all that apply
which statements about the allele for baldness are true?
a male would be bald if he were heterozygous for the trait, while a female would be bald only if she were homozygous recessive.
the allele for baldness causes hair loss that follows a typical pattern called male-pattern baldness.
the allele for baldness is a sex-linked trait.
the allele for baldness is recessive in females but dominant in males.

Explanation:

1. For the first statement: Male pattern baldness shows sex-influenced inheritance. Males only need one copy (heterozygous) of the baldness allele to express the trait, while females need two copies (homozygous recessive) for full baldness to occur.
2. For the second statement: The baldness allele is associated with male-pattern baldness, the most common form of hair loss with a distinct pattern.
3. For the third statement: Baldness is a sex-influenced autosomal trait, not a sex-linked trait (sex-linked traits are on X/Y chromosomes).
4. For the fourth statement: The allele acts as dominant in males (expressed with one copy) and recessive in females (needs two copies to be expressed fully), which defines sex-influenced inheritance.

Answer:

A. A male would be bald if he were heterozygous for the trait, while a female would be bald only if she were homozygous recessive.
B. The allele for baldness causes hair loss that follows a typical pattern called male-pattern baldness.
D. The allele for baldness is recessive in females but dominant in males.