question_answer

In a plant species, flower colour yellow is dominant oyer white and fruit shape round is dominant over elongated.  Crossing was performed between two pure lines-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 Fi were allowed to self-fertilise and about 960 plants survived in \[{{F}_{2}}.\]If the traits follow Mendelian inheritance, the number of plants would have yellow-flower and round-fruit in \[{{F}_{1}}\]and \[{{F}_{2}}\]are respectively

A)  20, 960

B)  20. 540

C)  10, 180

D)  10. 60

Correct Answer: B

Solution :

  Now, out of total 960 species survived in \[{{\text{F}}_{\text{2}}}\] The number of plants that would have yellow flower and round fruit in \[{{\text{F}}_{\text{2}}}\]generation will be \[\frac{9\,\text{round}\,\text{yellow}}{16\,(total\,progeny)}\times 960\] (Total survived) = 540 plants Thus, in \[{{F}_{1}}\]and \[{{F}_{2}}-\]generation, total yellow , colour, round fruit plants survived will be are 20, 540