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WAEC Biology 2004 Question 56

Question 56

Mendelian Inheritance

In the F1 generation of Mendel's experiment obtained by crossing pea plants of long stems with those of short stems, what was his observation?

  1. A.some were short while others were long
  2. B.all were long
  3. C.half of them were long while half were short
  4. D.three-quarters were long while one-quarter were short.
Show the answer and explanation

Answer: B (all were long)

Explanation

Crossing pure tall (TT) with pure short (tt) gives only Tt offspring, and since tall is dominant they are all long-stemmed.