Child A has two large X-shaped chromosomes, and Child B has one large X-shaped chromosome and one much smaller Y-shaped chromosome. What is Child A, and what is Child B?

A) female; male
B) male; female
C) an identical twin; a fraternal twin
D) a fraternal twin; an identical twin

X-Shaped Chromosomes

A description referring to the appearance of the X chromosome, one of the two sex chromosomes in many organisms, including humans.

Y-Shaped Chromosome

A reference to the Y chromosome, one of the two sex chromosomes in mammals, including humans, responsible for determining male biological characteristics.

Female

Pertaining to the sex that is typically characterized by the presence of two X chromosomes and is capable of bearing offspring or producing eggs.