How many cleavages are required for formation of 16 blastomeres?
1 Answer
Feb 12, 2018
15
Explanation:
First cleavage gives rise to 2 blastomeres. Each blastomere undergoes cleavage to form 2 blastomeres. Thus 3 cleavages occur for the formation of 4 blastomeres.
Each of the 4 blastomeres undergoes cleavage to form 2 blastomeres. Thus 7 (3 & 4) cleavages needed for the formation of 8 blastomeres.
Subsequently each of the 8 blastomeres undergoes cleavage to form 2 blastomeres, giving rise to total 16 blastomeres. Thus total 15 ( 7& 8) cleavages occur to form 16 blastomeres.