3.In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.
1.Females have two X chromosomes, and males have an X and a Y chromosome.
Answers & Comments
1.the 23rd
the sex chromosomes.
2.The X and Y chromosomes
3.In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.
1.Females have two X chromosomes, and males have an X and a Y chromosome.
2.autosomes