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Human Reproduction MCQs for NEET — Zoology Questions with Answers

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Eyelashes in foetus are formed

A. By the end of 12 weeks B. By the end of 20 weeks C. By the end of 24 weeks D. By the end of 30 weeks

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Explanation

Page number-54, para-2

3.6 Pregnancy And Embryonic Development

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Foetal ejection reflex

A. Causes release of oxytocin from maternal pituitary B. Itself is a result of release of oxytocin from maternal pituitary C. Wild uterine contraction D. More than one option

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Explanation

Page number-54,

3.7 Parturition And Lactation, Para-1

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What does a doctor inject to induce delivery?

A. Oxytocin B. Estrogen C. Progesterone D. Combination of B and C

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Explanation

Page number-54,

3.7 Parturition And Lactation; para-1

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Lactation starts at

A. At the end of pregnancy B. At the end of first trimester C. During pregnancy D. Before parturition

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Explanation

Page number-54,

3.7 Parturition And Lactation; Para-2

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Colostrum has

A. Only one antibody B. Several antibodies C. Two antibodies D. Four antibodies

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Explanation

Page number-54,

3.7 Parturition And Lactation, para-2

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Breast feeding during initial period

A. Good for healthy baby B. Recommended by doctors C. Essential to develop resistance for the new-born babies. D. All of these

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Explanation

Page number-54,

3.7 Parturition And Lactation, Para-2

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Which of the following events specifically signifies the end of the reproductive phase in females?

A. Continuous sperm formation in old age B. Cessation of ovum formation around fifty years of age C. Implantation of the blastocyst D. Initiation of gametogenesis at puberty

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Explanation

The context states: 'sperm formation continues even in old men, but formation of ovum ceases in women around the age of fifty years.' This directly indicates the end of the reproductive phase in females.

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Where does fertilisation typically occur in humans?

A. Uterus B. Vagina C. Ampulla of the fallopian tube D. Ovary

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Explanation

The text states: 'After coitus, sperms are transported to the ampulla, where the sperm fertilises the ovum leading to formation of a diploid zygote.' Additionally, one of the exercises asks 'Fertilisation takes place in _____________', implying a specific location.

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What is the ploidy of human male and female gametes, and the resulting zygote, respectively?

A. Diploid, Diploid, Diploid B. Haploid, Haploid, Diploid C. Diploid, Haploid, Haploid D. Haploid, Diploid, Diploid

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Explanation

The 'Fill in the blanks' section includes: '(d) Male and female gametes are _____________ (diploid/haploid)' and '(e) Zygote is _____________ (diploid/haploid)'. The formation of a diploid zygote from the fusion of gametes means the gametes must be haploid (n) and the zygote diploid (2n).

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The sex of the embryo is determined by the presence of a specific chromosome in which of the following?

A. Ovum B. Sperm C. Zygote D. Uterine lining

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Explanation

The text states: 'The presence of X or Y chromosome in the sperm determines the sex of the embryo.'.

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