Describe the chromosomes needed for an embryo to become a female and those needed for an embryo to become a male.

Answer:

Female eggs only have the X (female) chromosomes, while the male sperm cells have both the X and Y (male) chromosomes. If the X from the male and X from the female unite, then the child will be female. If the Y from the male and X from the female unite, then the child will be male.