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JAMB Biology 2006 Question 18

Question 18

Variation

Hassan and Hussain are identical twins but Hassan grows taller and fatter than Hussain. This is probably because

  1. A.Hassan inherits genes for tallness and fatness from the father
  2. B.they have dissimilar genotypes
  3. C.Hussain is endowed with genes for shortness and thinness
  4. D.they are raised in different environments
Show the answer and explanation

Answer: D (they are raised in different environments)

Explanation

Identical twins have the same genes. Any difference between them must come from their environment, such as food and exercise.