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NEET · Biology · STD 12 - 2. human reproduction

Fertilisation in humans is practically feasible only if

  1. A the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
  2. B the sperms are transported into cervix within 48 hrs of release of ovum in uterus
  3. C the sperms are transported into vagina just after the release of ovum in Fallopian tube
  4. D the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the Fallopian tube.
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Correct Answer

(D) the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the Fallopian tube.

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Detailed explanation

(d) : The fusion of a haploid male gamete (sperm) and a haploid female gamete (ovum) to form a diploid zygote is called fertilisation. In human beings, it takes place in the ampullary isthmic junction of the oviduct (Fallopian tube).