A pea plant with yellow & round seeds is crossed with another pea plant with green & wrinkled seeds produced 51 yellow round seeds & 49 yellow wrinkled seeds. Genotype of plant with yellow round seeds must be
A]YYR.
B]YyRr.
C]YyRR.
D]YYRR.
PLZ GIVE ME STEPWISE ANSWER.
Dear student,
Answer is A). RrYY.
Three cases arise from the cross between yellow round seeds and green wrinkled seeds which is given below.
In case 1 RRYY (round yellow seeds) when crossed with rryy (wrinkled green seeds) then all the offspring are yellow round seeds. So case 1 is false because the offspring should be yellow round and yellow wrinkled seeds. In case 2 RrYY when crossed with rryy then the offspring produced is RrYy (round yellow seeds) and rrYy (wrinkled yellow seeds). So case 2 is correct because the offspring produced is round yellow and wrinkled yellow seeds. Case 3 is false since the offspring produced is round yellow and round wrinkled.
Regards
Answer is A). RrYY.
Three cases arise from the cross between yellow round seeds and green wrinkled seeds which is given below.
In case 1 RRYY (round yellow seeds) when crossed with rryy (wrinkled green seeds) then all the offspring are yellow round seeds. So case 1 is false because the offspring should be yellow round and yellow wrinkled seeds. In case 2 RrYY when crossed with rryy then the offspring produced is RrYy (round yellow seeds) and rrYy (wrinkled yellow seeds). So case 2 is correct because the offspring produced is round yellow and wrinkled yellow seeds. Case 3 is false since the offspring produced is round yellow and round wrinkled.
Regards
