A) 1-2 weeks after fertilization
B) 2-3 weeks
C) 5 weeks
D) 8 weeks
E) 16 weeks

A) Based on production of sperm, we would expect the sex ratio to be 2 males for every 1 female.
B) More females than males are conceived.
C) By 20 years of age, the ratio of males to females is 1:1.
D) About the same number of males and females are born.
E) By 60 years of age, there are more males than females.

A) non-sex chromosomes.
B) another term for the sex chromosomes.
C) a pair of chromosomes.
D) chromosomes with mutated genes.
E) capable of forming Barr bodies.