The Gondeks are having a baby. If there are no unusual circumstances, their baby's genetic sex will be determined by
A) an X or Y chromosome supplied by the mother.
B) an X or Y chromosome supplied by the father.
C) X or Y chromosomes supplied by the mother and by the father.
D) all 46 chromosomes received from both parents.

Question

The Gondeks are having a baby. If there are no unusual circumstances, their baby's genetic sex will be determined by
A) an X or Y chromosome supplied by the mother.
B) an X or Y chromosome supplied by the father.
C) X or Y chromosomes supplied by the mother and by the father.
D) all 46 chromosomes received from both parents.

Quizplus · Accepted Answer

The baby's genetic sex is determined by the chromosomes supplied by the father. The father's sperm carries either an X or Y chromosome, which will determine if the baby will be male (XY) or female (XX). The mother always contributes an X chromosome to the baby's genetic makeup.

The Gondeks Are Having a Baby