Multiple choice

Which of the following genetic conditions arises by unequal crossing over between X and Y chromosomes during meiosis in the biological father of an individual?

  1. 48, XXXX

  2. 49, XXXXX

  3. 47, XYY

  4. 48, XXYY

  5. XX male syndrome

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

XX male syndrome is a rare sex chromosomal disorder. Usually it is caused by unequal crossing over between X and Y chromosomes during meiosis in the father, which results in the X chromosome containing the normally-male SRY gene.