How does y chromosome determine maleness in humans?

Answer 1

XX = female. XY= male because the Y chromosome has SRY gene (Sex-deterimining Region Y). The SRY gene in mammals makes the body produce testis which makes testosterone making the foetus male. For more information, please see the related link below.

Answer 2

The Y chromosome contains genes that encode proteins necessary for male development, such as the sex-determining region Y (SRY) gene. The SRY gene triggers the development of testes, which then produce testosterone and other hormones responsible for male sexual characteristics. In the absence of the Y chromosome, the default development pathway leads to the formation of female sexual characteristics.

Answer 3

your 23rd pair of chromosomes either has a XX or a XY. An XX is a female, a XY is a male. the y in the chromosomes determines it by a random guess

Answer 4

All the genes on the Y chromosome are related to male characteristics.

Answer 5

The Y chromosome contains genes for "maleness". It produces male sex hormones and while the fetus is developing, it produces direction for the formation of male parts.

Answer 6

It helps in the determination of sex. Its presence brings maleness in the human being.