Melissa and Brandon are having a baby and are hoping for a boy.The baby's sex will be decided by the chromosomes of:
A) Melissa.
B) Brandon.
C) both Melissa and Brandon.
D) neither Melissa nor Brandon.

Question

Quizplus · Accepted Answer

The sex of a baby is determined by the chromosomes contributed by the father, Brandon, in this case. Women carry two X chromosomes (XX), while men carry one X and one Y chromosome (XY). The mother always contributes an X chromosome, while the father can contribute either an X or a Y chromosome. If the father contributes a Y chromosome, the baby will be male (XY).

Melissa and Brandon Are Having a Baby and Are Hoping