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 trait carried on the x chromosome is more likely to be expressed in a son than in a daughter. a son is more likely than a daughter to inherit the recessive allele carried on the mothers x chromosome. the allele carried on chromosome 5 can be inherited by an offspring of either sex. the allele carried on the x chromosome can be inherited by an offspring of either sex. incorrect answer(s)

Explanation:

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

Answer:

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