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WAEC Biology 1993 Question 50

Question 50

Mendelian Inheritance

Identical twins inherit their genes from

  1. A.the same ovum and different sperms
  2. B.the same sperm and different ova
  3. C.different sperms and many ova
  4. D.the same ovum and the same sperm
  5. E.many ova and many sperms
Show the answer and explanation

Answer: D (the same ovum and the same sperm)

Explanation

Identical twins come from one zygote (one ovum fertilised by one sperm) that splits in two.