Why is the Y Chromosome Able to Pair with the X

Question

Why is the Y chromosome able to pair with the X chromosome during meiosis?
A) The Y chromosome has the same centromere placement as the X chromosome
B) The Y chromosome is the same length as the X chromosome
C) The X and Y chromosomes share small gene segments that allow them to act like homologues during meiosis
D) None of these
E) All of these

Accepted Answer

The X and Y chromosomes share small gene segments that allow them to act like homologues during meiosis, which enables them to pair and participate in crossover events. The other options are not accurate; the Y chromosome has a different centromere placement and is shorter than the X chromosome.