In a plant species, flowere colour yellow is dominant over white and fruit shape round is dominant over elongated. Crossing was performed between two pure lines, i.e. one having yellow-flower and round -fruit and another with white-flower and elongated-fruit. About 20 plants survived in `F_(1)` progeny. Plants of `F_(1)` were allowed to self-fertilise and about 960 plants survived in `F_(2)` . If the traits follow Mendelia inheritance, the number of plants that would have yellow-flower and round -fruit in `F_(1)` and `F_(2)` are respectively.

Options

A. 20, 960
B. 20, 540
C. 10, 180
D. 10, 60

Answer

B

Explanation

`F_(2)`-generation Yellow rounded: Yellow elongated : White rounded: White elongated
`9:3:3:1`
Now, out of total 960 species survived in `F_(2)`-generation the number of plants that would have yellow flower and round fruit in `F_(2)`-generation will be `("9 (round yellow)")/(16" (total progeny"))xx960`
(Total survived)=540 plants,
Thus, in `F_(1)` and `F_(2)`-generation total yellow colour, round fruit plants survived will be 20540.