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In a dihybrid cross involving two genes with dominant epistasis, what is the expected phenotypic ratio of the F2 generation?

 

Option: 1

9:3:3:1

 


Option: 2

9:7
 


Option: 3

12:3:1

 


Option: 4

1:1:1:1


Answers (1)

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In a dihybrid cross involving two genes with dominant epistasis, the expected phenotypic ratio of the F2 generation is 9:7. This ratio results from the interaction of the dominant alleles at one gene locus masking the expression of the other gene. Hence option B is the correct answer.

Option(A) In a dihybrid cross involving two genes with dominant epistasis, the expected phenotypic ratio of the F2 generation is 9:7. This ratio results from the interaction of the dominant alleles at one gene locus masking the expression of the other gene. Hence option A is incorrect.

Option(C) In a dihybrid cross involving two genes with dominant epistasis, the expected phenotypic ratio of the F2 generation is 9:7. This ratio results from the interaction of the dominant alleles at one gene locus masking the expression of the other gene.  Hence option C is incorrect.

Option(D) In a dihybrid cross involving two genes with dominant epistasis, the expected phenotypic ratio of the F2 generation is 9:7. This ratio results from the interaction of the dominant alleles at one gene locus masking the expression of the other gene. Hence option D is incorrect.

 

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Gautam harsolia

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