WAEC Biology questions: Heredity and variation

24 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Heredity and variation· WAEC

   A person with sickle cell trait has the genotype

   • AHbSS
   • BHbAA
   • CHbAS
   • DHbSC only

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   Explanation and discussion

2. Question 22· Heredity and variation· WAEC

   The scientist known as the father of genetics is

   • ACharles Darwin
   • BGregor Mendel
   • CLouis Pasteur
   • DRobert Hooke

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   Explanation and discussion

3. Question 23· Heredity and variation· WAEC

   Two heterozygous tall pea plants (Tt × Tt) are crossed. What is the phenotypic ratio of the offspring?

   • A3 tall : 1 short
   • B1 tall : 1 short
   • Call tall
   • D1 tall : 3 short

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   Explanation and discussion

4. Question 24· Heredity and variation· WAEC

   Haemophilia is more common in males because it is

   • Ainfectious
   • Bcarried on the Y chromosome
   • Ccaused by diet
   • Dsex-linked on the X chromosome

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   Explanation and discussion