Question

What is the genotype ration between the cross YyRr x YyRr?

YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:yyrr
2YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:yyrr
YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:yyRr:2yyrr
YYRR:2YYRr:2Yyrr:4YyRr:YYrr:2YyRR:yyRR:2yyRr:yyrr

Answer 1

Pretty sure this is how to work it. Hope this helps!

Answer 2

Option D

1 YYRR: 2 YYRr: 2 Yyrr: 4 YyRr : 1 YYrr : 2 YyRR : 1 yyRR : 2 yyRr: 1 yyrr

Step-by-step explanation:

The genotype of the cross between dihybrid cross will be as follows

YR

Yr

yR

yr

So the punnet square for this cross will be as follows -

YR Yr yR yr

YR YYRR YYRr YyRR YrRr

Yr YYRr YYrr YyRr Yyrr

yR YyRR YyRr yyRR yyRr

yr YyRr Yyrr yyRr yyrr

The genotypic ratio is as follows -

1 YYRR: 2 YYRr: 2 Yyrr: 4 YyRr : 1 YYrr : 2 YyRR : 1 yyRR : 2 yyRr: 1 yyrr

Hence,option D is the correct answer