Question

a tall pea plant with round seed is crossed with a dog pea plant with wrinkles seed
1)what will be appearance of the F1 progeny
2)what is this type of cross referred to as
3)what will be the appearance of f2 progeny when f1 plants are self pollinated
4)which two new combination cropped up in f2 generation 5)what is the phenotype ratio of this cross
6)represent in class with the help of flowchart​

Answer 1

Answer:

The progeny of long plant with round seeds (TTRR) crossed with short plants with wrinkled seeds (ttrr) are all long plants with round seeds (TtRr). This is because tallness and round shape are both dominant traits while shortness and wrinkled shapes of seeds are recessive traits.

When F1 progeny (TtRr) are cross-bred by self pollination, then four types of progeny are produced in F2 generation. Out of these four types of progeny, two types will have traits like parents and the other two will have combination of traits. Thus,

1. Progeny with tall plants and round seeds- 9

2. Progeny with tall plants and wrinkled seeds-3

3. Progeny with short plants and round seeds-3

4. Progeny with short plants and wrinkled seeds-1

Thus, the phenotypic ratio in F2 generation will be- 9:3:3:1

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