Bipotential Gonad - Deepstash

Bipotential Gonad

  • Many X chromosome genes specify traits unrelated to sex, such as the ability to distinguish red and green colors.
  • However, the Y chromosome contains genes specifying the development of testes.
  • In the fifth week after fertilization human embryos of either sex develop a “bipotential” gonad that can become either a testis or an ovary.
  • If a Y chromosome is present, that bet-hedging gonad begins to commit itself in the seventh week to becoming a testis, but if there’s no Y chromosome, the gonad waits until the thirteenth week to develop as an ovary.

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prince_rahul

The more one seeks to rise into height and light, the more vigorously do ones roots struggle earthward, downward, into the dark, the deep — into evil.

To us humans, the sex lives of animals seem weird. But it's our own sex lives that are truly bizarre. Stranger yet, we have sex at any time, even during periods of infertility, such as pregnancy or post-menopause. Why does the human female, virtually alone among mammals, go through menopause? Why does the human male stand out as one of the few mammals to stay with the female he impregnates, to help raise the children that he sired? Why is the human penis so unnecessarily large?

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