What is dosage compensation and why is it necessary in placental mammals?

What will be an ideal response?


Ans: Dosage compensation balances the expression of genes that are found in different copy numbers in different individuals of the same species. In placental mammals, females have two copies of all X chromosome genes, while males have only one copy. The dosage compensation mechanism is X inactivation in females; one of the two X chromosomes in female cells is inactivated, so X chromosome genes are equally expressed in males and females.

Biology & Microbiology

You might also like to view...

Many single-celled eukaryotes that normally exist in a haploid state reproduce asexually by:

A. meiotic cell division. B. binary fission. C. mitotic cell division. D. fusion.

Biology & Microbiology

For eukaryotes, translation takes place in the _____

a. nucleus b. nucleolus c. cytoplasm d. plasma membrane e. nucleus and cytoplasm

Biology & Microbiology

Which hormones are secreted by the adrenal cortex, and regulate the ion balance of the body?

A. Corticosteroids
B. Glucocorticoids
C. Mineralocorticoids
D. Gonadocorticoids

Biology & Microbiology

The notochord induces the neural plate Indicate whether the statement is true or false

Biology & Microbiology