Question 32 Vhich of the following statements is true regarding fertilization? E

Question

Question 32 Vhich of the following statements is true regarding fertilization? ELECT ALL THAT APPLY Fertilization of a secondary oocyte may only be accomplished by spermatozoa that have undergone A spermatozoan capable of fertilization the "egg" must penetrate the corona radiata and shed its ac the "egg". Fertilization occurs 4 to 5 hours after implantation. Fertilization by one sperm normally prevents other sperm from entering the ovum. Fertilization occurs in the upper one third of the uterine tube.

Explanation / Answer

33) the answer is D :

Because when the sperm enters the cytoplasm of oocyte the outer covering of the sperm and tail disintegrate and this causes a cortical reaction preventing other sperm from fertilizing same egg

34) in this all are correct except D because

females have two XX And male cells have XY some sperm cells carry X chromosome and some carry Y chromosome on the basis of which the sex of progeny depends so all the ova contain x chromosomes after fertilization the zygote may contain XX or XY but x chromosome is common

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