WAEC Biology 2005 Question 28

Question 28

Reproduction in Animals

When both ovaries of the human female ovulate simultaneously and both ova are fertilized, then

  1. A.identical twins are produced
  2. B.fraternal twins are produced
  3. C.Siamese twins are produced
  4. D.the children produced are genetically identical
Show the answer and explanation

Answer: B (fraternal twins are produced)

Explanation

Two different eggs fertilised by two different sperms give fraternal (non-identical) twins, who are no more alike than ordinary siblings.