Question

A man who carries an X-linked allele will pass it on to: 1) all of his daughters 2) half of his daughters 3) all of his sons 4) half of his sons 5) all of his children

Answer 1

1. All of his daughters.

Step-by-step explanation:

A man has only one X chromosome, and it is paired to a Y chromosome, so during meiosis, his gametes (sperm cells) will either have an X or a Y chromosome. This chromosome defines the sex of the offspring in humans, so if his child gets an X chromosome, it will be a girl. If a Y, then it will be a boy. So no boys will get any alleles linked to the X chromosome, but all girls will.