AP BIOLOGY

ANIMAL REPRODUCTION AND DEVELOPMENT

ASEXUAL REPRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A child’s sex is determined by the sex chromosomes of which person?
A
grandfather
B
grandmother
C
mother
D
father
Explanation: 

Detailed explanation-1: -The mother gives an X chromosome to the child. The father may contribute an X or a Y. The chromosome from the father determines if the baby is born as male or female.

Detailed explanation-2: -Every egg has an X sex chromosome; a sperm can have either an X or a Y sex chromosome. If the sperm that fertilizes an egg has an X chromosome, the baby is female; if it has a Y chromosome, the baby will be a boy.

Detailed explanation-3: -The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes.

Detailed explanation-4: -What we can say is that dad’s sperm determines whether a baby will be born as a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first.

There is 1 question to complete.