Q. 224.6( 5 Votes )

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Answer :

(a) One spermatocyte is required to produce four spermatozoa. So-

1 spermatocyte 4 spermatozoa


? spermatocytes 300 million spermatozoa


= = 75 million


Therefore, 75 million spermatocytes are required to produce 300 million spermatozoa


(b) 300 million spermatids will be formed.


(c) In a primary oocyte, there are 46 chromosomes. Since each chromosome has 2 sister chromatids, therefore the total number of chromatids = 46×2 = 92 chromatids. Since Meiosis I is completed by this phase, therefore the number of chromatids = 92/2 = 46 chromatids.


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