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CBSE Class 12-science Answered

In sweet pea yellow seed (YY) is dominant over wrinkled (rr) .what will be the phenotypic ratio would be obtained in the progeny of following crosses. 1. YyRR × YYRr 2. Yyrr × yyrr 3. yyRr ×YyRr 4. YyRr × yyRR  
question image
Asked by gschinubn56 | 03 Sep, 2022, 10:12: AM
answered-by-expert Expert Answer

1. YyRR × YYRr

Gametes: YR, YR, yR, yR

 

YR

YR

yR

yR

YR

YYRR

YYRR

YyRR

YyRR

YR

YYRR

YYRR

YyRR

YyRR

yR

YyRR

YyRR

yyRR

yyRR

yR

YyRR

YyRR

yyRR

yyRR

Phenotypic Ratio = Yellow Round : Green Round = 12:4 = 3:1

Similarly, other crosses can be solved using a Punnett square and phenotypic ratio can be calculated.
Answered by Sheetal Kolte | 09 Sep, 2022, 12:27: PM
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