Question

Which of the following is correct about morula?

• A. Less cytoplasm and less DNA than zygote.
• B. Same amount of cytoplasm and DNA as zygote.
• C. More cytoplasm and more DNA than zygote.
• D. Same amount of cytoplasm but much more DNA than zygote.

Answer 1

Answer: (D)

Same amount of cytoplasm but much more DNA than zygote.

In cleavage, divisions are mitotic divisions the single-celled zygote is converted into a multicellular morula. But during cleavage divisions, no growth of resultant daughter cells/blastomeres is observed. So, the DNA content will increase, but there is no increase or insignificant increase in the amount of protoplasm takes place.

So the correct option is 'The same amount of cytoplasm but much more DNA than the zygote.'