A cross was made between pure breeding pea plants one with round and green seeds and the other with wrinkled and yellow seeds

(a) Write the phenotype of $F_{1}$ progeny. Give reason for your answer.

(b) Write the different types of $F_{2}$ progeny obtained along with their ratio when $F_{1}$ progeny was selfed

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Solution

(a) The cross was made between round, green seeds and wrinkled, yellow seeds. In the given cross, two traits were taken into account, which is a dihybrid cross.
Yellow colour and round shape is dominant over green colour and wrinkled shape

The above cross shows round and yellow seeds in the F1 generation. It occurs because dominant traits (round and yellow) express itself, whereas recessive traits (wrinkled and green) get suppressed.

(b) On selfing of F1 generation

Phenotypic ratio - 9:3:3:1

Round yellow - 9

Round green - 3

Wrinkled yellow - 3

Wrinkled green - 1

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Question 11
Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have a new combination of characters. Choose the new combination of the following.
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(b) (i) and (iv)
(c) (ii) and (iii)
(d) (i) and (iii)

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A cross was made between pure breeding pea plants one with round and green seeds and the other with wrinkled and yellow seeds (a) Write the phenotype of F1 progeny. Give reason for your answer. (b) Write the different types of F2 progeny obtained along with their ratio when F1 progeny was selfed