Why is Y chromosome genetically less active?
Answers
Answer:
Recombination inhibition
Over time, the Y chromosome changed in such a way as to inhibit the areas around the sex determining genes from recombining at all with the X chromosome. As a result of this process, 95% of the human Y chromosome is unable to recombine. Only the tips of the Y and X chromosomes recombine.
Explanation:
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Answer:
Euchromatin, which includes DNA or genes, makes up a minor portion of the Y chromosome, making it less genetically active.
Explanation:
One of the two sex chromosomes in humans is the Y chromosome (the other is the X chromosome). One of the 23 pairs of human chromosomes found in each cell is the sex chromosome. The Y chromosome makes up over 2% of all DNA in cells and spans more than 59 million base pairs, the basic unit of DNA.
Each cell in a person typically contains one set of sex chromosomes. Males have one X and one Y chromosome, while females have two X chromosomes. Males also contain the Y chromosome.
Genetic research is currently focused on identifying the genes present on each chromosome. The estimated number of genes varies because scientists employ several strategies to determine the number of genes on each chromosome. There are between 70 and 200 genes that give instructions on how to make proteins on the Y chromosome. The genes on the Y chromosome, which is only found in males, are typically involved in the development and regulation of the male sex. The SRY gene, which is in charge of a fetus' transformation into a man, controls sex. For men to have biological children, other genes on the Y chromosome are crucial (male fertility).
The Y chromosome evolved over time in a way that prevented the regions near the sex-determining genes from ever recombining with the X chromosome. This procedure renders 95% of the human Y chromosome incapable of recombination. Only the Y and X chromosome tips combine.
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