The Y chromosome is present in only one copy in males, and therefore most of the genes it contains are effectively haploid

Although there is recombination between the pseudoautosomal regions of the X and Y, there is not a homologous section for large parts of the Y chromosome. How are the male-specific genes prevented from accumulating mutations and becoming nonfunctional?

What will be an ideal response?


Ans: The 60 or so male-specific genes are present in multiple copies (ampliconic segments) on the Y chromosome and undergo recombination within these regions to maintain active genes via a process called gene conversion. Through recombination, inactivated genes are replaced from the pool of active genes in these segments.

Biology & Microbiology

You might also like to view...

Changes in pre-mRNA processing and the rate at which mRNAs are degraded are a part of ____

a. histone modifications b. chromatin remodeling c. transcriptional regulation d. posttranscriptional regulation e. genomic imprinting

Biology & Microbiology

The birth control pill is a mixture of ________ that prevent the maturation of the oocyte

a. progesterone and estrogen b. estrogen and luteinizing hormone c. estrogen and follicular stimulating hormone d. progesterone and testosterone e. testosterone and growth hormone

Biology & Microbiology

Which of the following is not one of the groups of streptococci?

A. Dermal streptococci B. Oral streptococci C. Pyogenic streptococci D. None of the choices are correct. 

Biology & Microbiology

Place the following levels of biological organization in order, with the smallest, least inclusive level first._____community_____ecosystem_____species_____population_____biosphere

What will be an ideal response?

Biology & Microbiology