Final answer:
The Pseudoautosomal regions (PARs) of the Y chromosome have homology with the X chromosome, allowing them to pair up during prophase I of meiosis.
Step-by-step explanation:
The region of the Y chromosome that has homology with regions of the X chromosome is the Pseudoautosomal regions (PARs).
Explanation: In humans, the X and Y chromosomes are responsible for determining sex. The Pseudoautosomal regions are the specific portions at the ends of the sex chromosomes that share an identical sequence of bases. During meiosis, specifically in prophase I, the PARs allow the X and Y chromosomes to pair up and recombine, ensuring the correct segregation of the chromosomes during the formation of gametes.
The Sex-determining region (SRY) is not involved in homology with the X chromosome; rather, it triggers the development of male characteristics. Similarly, the Nonrecombining region of the Y (NRY) and the Male-specific region of the Y (MSY) exhibit no homology with the X chromosome.