Question

Dosage compensation in human cells is achieved by

a)doubling the activity of genes on the single X chromosome of males.
b)halving the activity of genes on both X chromosomes of females.
c)inactivating one X chromosome of females.
d)All of the above
e)None of the above

Answer 1

In human cells, dosage compensation is achieved by the inactivation of one of the two X chromosomes in females, a process called X inactivation.

Step-by-step explanation:

Dosage compensation in human cells is achieved by inactivating one X chromosome of females. This process, known as X inactivation, occurs early in development when female mammalian embryos have only a few thousand cells. One X chromosome is randomly chosen to inactivate by condensing into a Barr body, ensuring that females compensate for their double genetic dose of X chromosome. This inactivation is passed on to all daughter cells, maintaining dosage compensation throughout development.