Question

) explain xxx y mechanism​

Answer 1

Answer:

XXXY syndrome is a genetic condition characterized by a sex chromosome aneuploidy, where males have two extra X chromosomes.Males typically have only two sex chromosomes, an X and a Y. The presence of one Y chromosome with a functioning SRY gene causes the expression of genes that determine maleness. Because of this, XXXY syndrome only affects males. The additional two X chromosomes in males with XXXY syndrome causes them to have 48 chromosomes, instead of the typical 46. XXXY syndrome is therefore often referred to as 48,XXXY. There is a wide variety of symptoms associated with this syndrome, including cognitive and behavioral problems, taurodontism, and infertility.This syndrome is usually inherited via a new mutation in one of the parents’ gametes, as those affected by it are usually infertile. It is estimated that XXXY affects one in every 50,000 male births.

Answer 2

Answer:

Some grasshoppers also use a single-chromosome (XX/XO) sex determination system; here, males have only one sex chromosome, so they are considered to be XO. Thus, males are the heterogametic sex, because they produce two different kinds of gamets.