5. How is sex determined in placental mammals? What is the function of a Barr bo

Question

5. How is sex determined in placental mammals? What is the function of a Barr body in female placental mammals; why is it necessary? 6. How is sex determined in birds? In which gender would you expect to see a Barr body in birds?
5. How is sex determined in placental mammals? What is the function of a Barr body in female placental mammals; why is it necessary? 6. How is sex determined in birds? In which gender would you expect to see a Barr body in birds?
5. How is sex determined in placental mammals? What is the function of a Barr body in female placental mammals; why is it necessary? 6. How is sex determined in birds? In which gender would you expect to see a Barr body in birds?

Explanation / Answer

5- the sex is determined in placental mammal by presence of y chromosome . The functional barr body in females is inactived during the embryogenesis itself so that the amount of gene expressed by functional X chromosome should not be doubled by presence of two X chromosome in females.

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