passwella.
Menu

JAMB Biology 1981 Question 5

Question 5

Mendelian Inheritance

What is the genetic ratio of a cross between a homozygous tall plant and a homozygous dwarf plant?

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

Answer: E (4 tall: 0 short)

Explanation

TT × tt gives only Tt offspring, so all are tall (4 tall : 0 short).