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.
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A. meiotic cell division. B. binary fission. C. mitotic cell division. D. fusion.
For eukaryotes, translation takes place in the _____
a. nucleus b. nucleolus c. cytoplasm d. plasma membrane e. nucleus and cytoplasm
Which hormones are secreted by the adrenal cortex, and regulate the ion balance of the body?
A. Corticosteroids
B. Glucocorticoids
C. Mineralocorticoids
D. Gonadocorticoids
The notochord induces the neural plate Indicate whether the statement is true or false