Question

a woman is a carrier for two recessive genetic conditions: one is carried on chromosome 5, and one is carried on the x chromosome. which of the following statements is true regarding the inheritance of these two traits? correct answer(s) the allele carried on chromosome 5 can be inherited by an offspring of either sex. a son is more likely than a daughter to inherit the recessive allele carried on the mothers x chromosome. the trait carried on the x chromosome is more likely to be expressed in a son than in a daughter. the allele carried on the x chromosome can be inherited by an offspring of either sex.

Explanation:

1. Chromosome 5 is an autosome. Autosomal - recessive alleles can be inherited by offspring of either sex.
2. Sons have one X - chromosome which they inherit from their mother. Daughters have two X - chromosomes (one from mother and one from father). So a son is more likely to inherit the recessive allele on the mother's X - chromosome.
3. Sons have only one X - chromosome. If they inherit the recessive allele on the X - chromosome from their mother, they will express the trait (if it is X - linked recessive). Daughters need to inherit two copies of the recessive allele (one from each parent) to express the trait, so the X - linked recessive trait is more likely to be expressed in sons.
4. The X - chromosome can be passed to both sons and daughters. Sons get their X - chromosome from their mother and daughters get one of their X - chromosomes from their mother.

Answer:

The allele carried on chromosome 5 can be inherited by an offspring of either sex.
A son is more likely than a daughter to inherit the recessive allele carried on the mother's X chromosome.
The trait carried on the X chromosome is more likely to be expressed in a son than in a daughter.
The allele carried on the X chromosome can be inherited by an offspring of either sex.