Which one of the following statements about morula in humans is correct?

Options

A. It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
B. It has far less cytoplasm as well as less DNA than in an uncleaved zygote
C. It has more or less equal quantity of cytoplasm and DNA
D. It has more cytoplasm and more DNA than an uncleaved zygote

Answer

A

Explanation

(a) Cleavage divvisions are mitotic division, in which the single-celled zygote is converted into a multicellualr morula. But during cleavage divisions, there is no growth of resultant daughter cells/blastomeres. So, the DNA content will increase, but there is no increase or insignificant increase in amount of protoplasm.