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  • In a certain plant , yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r) . The two genes involved are located on different chromosom

In a certain plant , yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r) . The two genes involved are located on different chromosomes 

Which of the following will result when plant YyRr is self pollinated ? 

Option: 1

9:3:3:1 ratio of phenotypes only 


Option: 2

9:3:3:1 ratio of genotypes only 


Option: 3

1:1:1:1 ratio of phenotypes only 


Option: 4

1:1:1:1 ratio of phenotypes and genotypes 


Answers (1)

best_answer

As we have learned

Dihybrid cross -

It is a cross between plants differing in two traits. 

- wherein

Like color and shape

When plant YyRr is self pollinated, 9 : 3 : 3 : 1 ratio of phenotypes is observed.

 

Phenotypic ratio = 9 yellow and round : 3 yellow and oval : 3 green and round : 1 green and oval

 

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Gunjita

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