Question

$32-$ celled stage of human embryo is

• A. Four times the fertilized egg
• B. Two times the size of fertilized egg
• C. Smaller size as fertilized egg
• D. Smaller than fertilized egg

Answer 1

The correct option is C Smaller size as fertilized egg

Size of 32-celled stage

During the cleavage, blastomeres do not grow in size as there is no growth during interface and new cells formed become smaller and smaller to keep the overall size of the cell mass same as that of zygote. Hence the size of blastula is the same as the size of a fertilised egg.

Final answer:

(b) Same size as fertilized egg