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Human Reproduction

Fill In the Blanks

21. A secondary oocyte has a .................. chromosome number while a fertilised ovum has a..................chromosome number.

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One Word Answers

22. The tube which extends from vestibule to uterus in the female is called.

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23. It is the external genital opening of the female mammal.

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24. The process by which testes produce spermatozoa from its male germ cells by meiotic division.

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25. The process by which ovary produces ova or eggs from its female germ cells by meiotic division.

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26. Development of a fully formed animal directly from an unfertilized ovum.

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Short Answer Type

27. What is the function of Sertoli cells ?

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28. What is Colostrum ?

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29. Define spermiogenesis. Where does it occur ?

Spermiogenesis. The transformation of non-motile spermatids into motile spermatozoa is called spermiogenesis. It occurs inside seminiferous tubules of testes.

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30. How does colostrum provide initial protection against diseases to new born infants ? Give one reason.

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