9. Cleavage refers to: (a) mitotic divisions that occur in the first 3 days of e

Question

9. Cleavage refers to: (a) mitotic divisions that occur in the first 3 days of embryonic life (b) meiotic divisions that occur in the ovary (c) implantation of the blastocyst into the uterine wal (d) fertilization of an egg with a spernm 10. The following is true for dizygotic twins: (a) they are produced when a single egg is fertilized and later divides into two (b) they are genetically identical (c) they always have the same sex (d) they are produced when two eggs are fertilized by separate sperms

Explanation / Answer

9-a

10- d

Note- dizygotic twin are when two separate zygote are formed by two egg fertilizatn by two sperm cell.

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