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WAEC Agricultural Science 2011 Question 37

Question 37

Basic Genetics

If T represents the gene for tallness while t represents dwarfness, use the information to answer questions 37 and 38.
When a tall (TT) crop is crossed with a dwarf (tt) crop, the resultant crops will be

  1. A.100% dwarf.
  2. B.100% tall.
  3. C.50% tall and 50% dwarf.
  4. D.75% tall and 25% dwarf.
Show the answer and explanation

Answer: B (100% tall.)

Explanation

All offspring are Tt, and T is dominant, so all are tall.