question_answer

State the number of cells that are found in the following embryonic stages

(i) Blastocyst

(ii) Morula

(iii) Zygote after 30 hours of fertilisation

(iv) Ovum

Answer:

(i) At the stage of blastocyst formation about 64 cells are present.

(ii) Morula is 16-celled stage.

(iii) Zygote after 30 hours of fertilisation has 2 cells.

(iv) Ovum is single-celled.