Question

1. a sex - linked (x linked) gene a. is carried on one of the sex chromosomes b. is generally passed from mothers to sons c. show up more often in males than in females d. two of these are correct e. all of these are correct

Explanation:

A sex - linked (X - linked) gene is located on a sex chromosome (usually the X chromosome). Males have one X chromosome and females have two. Mothers pass their X - linked genes to sons. Since males have only one X chromosome, recessive X - linked traits show up more often in males than in females as females need two copies of the recessive allele to express the trait.

Answer:

E. all of these are correct