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 Form 4 Biology Genetics Questions and Answers

Tallness in pea plants is due to a dominant gene. Two tall pea plants were crossed and their F1 generations were in the ration of 3 tall: 1 short. Using letter T to represent the gene for tallness and t for shortness, give the
(a) (i) Genotype of the parents (ii) Gamete of the parents
(iii) Genotype ratio of the F1 generation.
(b) What is meant by the term testcross in genetic studies?

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