1.After fertilization, the embryo goes through “ Cleavage” . The _______________

Question

1.After fertilization, the embryo goes through “Cleavage”. The _________________ increases, while the total ______________ remains constant.

2. As compared to female gametes, male gametes have these morphological features:

3.Because frogs have external fertilization they do not need to coordinate egg and sperm release. True or false?

4. Adult human females carry gametes arrested in Meiosis I. True or false?

5. Please define the two properties of stem cells.

6. How are embryonic stem cells derived from the developing embryo?

7. What are the tissues in the adult body that an embryonic stem cell can generate?

Explanation / Answer

Ans 1 : After fertilization , the embryo goes through "cleavage". The number of cells increases while the total size of cell remains constant.

After fertilization , several mitotic cell division occur , die to which the number of cekll increases multifold , but the overall size of the cell remains constant. This structure is now called as blastula.

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