The sex of a child is determined by:
A. the presence of an X chromosomes in egg (or ovum)
B. the presence of a Y chromosomes in sperm
C. the egg of father and mother
D. the length of the mother’s pregnancy
Answer:B
The sex of a child is determined by:
A. the presence of an X chromosomes in egg (or ovum) B. the presence of a Y chromosomes in sperm C. the egg of father and mother D. the length of the mother’s pregnancy