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STD 12 - 2. human reproduction — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 2. human reproduction1 Mark
MCQ
Fraternal twins in man are produced when
  • A
    Two sperms fertilize an ovum and the first two blastomeres separate from each other
  • B
    One sperm fertilizes an ovum and first two blastomeres separate from each other
  • C
    Egg develops parthenogenetically and first two blastomeres separate from each other
  • ✓
    Two ova are fertilized simultaneously
✓

Answer

Correct option: D.
Two ova are fertilized simultaneously
d
(d)Dizygotic twins are also called fraternal or nonidentical twins, formed by simultaneous fertilization of two different ova by two different sperms.

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