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WAEC Biology 2023 Question 47

Question 47

Mendelian Inheritance

The illustration below is a genetic diagram:
Gametes across the top: E, E. Gametes down the side: E, e.
Row E: I, II
Row e: III, IV
The genotypic ratio of the offspring in the genetic diagram is

  1. A.1:1.
  2. B.1:2:1.
  3. C.1:3.
  4. D.4:0.
Show the answer and explanation

Answer: A (1:1.)

Explanation

There are two EE and two Ee offspring, so the genotypic ratio is 2:2, which is 1:1.