A.30 minutes of 1st cleavage
B.60 minutes of 1st cleavage
C.90 minutes of 1st cleavage
D.120 minutes in frog’s egg begins after
A.30 minutes of 1st cleavage
B.60 minutes of 1st cleavage
C.90 minutes of 1st cleavage
D.120 minutes in frog’s egg begins after