Question

A farmer wishes to have a good variety of bean on his farm. He crosses a long bean which was resistant to infection with a variety that was short and infected. Both traits were pure breed

1.Write the genotype of parent plants.

2.List the gametes.

3.Draw Punnet square to show F1 and F2 generation.

4.Write the phenotypic ratio for both generations

Answer 1

A. Geno type of parent plant is : LLRR x llrr

B.Gamtes : LR and lr

C. F₁^{generation :}male : lr x gametes :LR

Gametes : LR, Lr, lR, lr

F₂generation :   female generation

male generation LR Lr lR lr

LR	LLRR	LLRr	LlRR	LlRr
Lr	LLRr	LLrr	LlRr	Llrr
lR	LlRR	LlRr	llRR	llRr
lR	LlRr	Llrr	llRr	llrr

D . Phenotype ratio : 1. F₁ generation is resistent to infection and long beans

2. F₂ is resistent to infection and long, resistent to infection and short, non resistent to infection , long, non resistent to infection , short