First slide

Inheritance of One Gene

Question

True breeding tall and dwarf pea plants are crossed and total 2000 seeds were obtained in $F_{2}$ generation. Find out the number of seeds that will resemble phenotypically with $F_{1}$ parent.

Moderate

A

500
B

750
C

1500
D

250

Solution

Phenotype of $F_{1}$ plant is tall (Tt).
Phenotypic ratio in $F_{2}$ generation= 3 (Tall): 1 (Dwarf)
Total seed produced in $F_{2}$ generation= 2000
No. of seeds resembling phenotypically with $F_{1}$ parent= 2000 * (3/4) = 1500 seeds

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