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If x is the phenotypic ratio of monohybrid cross for trait A and y is the phenotypic ratio of monohybrid cross for trait B, what would be the phenotypic ratio of a dihybrid cross involving traits A and B?
- a)xy
- b)x + y
- c)x2 + y2
- d)(xy)2
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
If x is the phenotypic ratio of monohybrid cross for trait A and y is ...
Phenotypic ratio in Monohybrid Cross:
- Monohybrid cross involves the inheritance of a single trait.
- The phenotypic ratio of a monohybrid cross is 3:1, which means that for every 4 offspring, 3 exhibit the dominant trait and 1 exhibits the recessive trait.
- Let x be the phenotypic ratio of the monohybrid cross for trait A, then x = 3:1.
- Similarly, let y be the phenotypic ratio of the monohybrid cross for trait B, then y = 3:1.
Phenotypic ratio in Dihybrid Cross:
- Dihybrid cross involves the inheritance of two traits.
- The phenotypic ratio of a dihybrid cross is 9:3:3:1, which means that for every 16 offspring, 9 exhibit both dominant traits, 3 exhibit one dominant and one recessive trait, 3 exhibit the other dominant and recessive trait, and 1 exhibits both recessive traits.
- To find the phenotypic ratio of a dihybrid cross involving traits A and B, we need to multiply the individual phenotypic ratios x and y.
- Therefore, the phenotypic ratio of the dihybrid cross involving traits A and B is xy = 3:1 x 3:1 = 9:1.
Answer:
- The phenotypic ratio of a dihybrid cross involving traits A and B is xy, which is option A.
- Monohybrid cross involves the inheritance of a single trait.
- The phenotypic ratio of a monohybrid cross is 3:1, which means that for every 4 offspring, 3 exhibit the dominant trait and 1 exhibits the recessive trait.
- Let x be the phenotypic ratio of the monohybrid cross for trait A, then x = 3:1.
- Similarly, let y be the phenotypic ratio of the monohybrid cross for trait B, then y = 3:1.
Phenotypic ratio in Dihybrid Cross:
- Dihybrid cross involves the inheritance of two traits.
- The phenotypic ratio of a dihybrid cross is 9:3:3:1, which means that for every 16 offspring, 9 exhibit both dominant traits, 3 exhibit one dominant and one recessive trait, 3 exhibit the other dominant and recessive trait, and 1 exhibits both recessive traits.
- To find the phenotypic ratio of a dihybrid cross involving traits A and B, we need to multiply the individual phenotypic ratios x and y.
- Therefore, the phenotypic ratio of the dihybrid cross involving traits A and B is xy = 3:1 x 3:1 = 9:1.
Answer:
- The phenotypic ratio of a dihybrid cross involving traits A and B is xy, which is option A.
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If x is the phenotypic ratio of monohybrid cross for trait A and y is ...
For a dihybrid cross involving two traits, the independent law of assortment states that the traits would segregate independently of each other. Thus, the phenotypic ratio would be xy.
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If x is the phenotypic ratio of monohybrid cross for trait A and y is the phenotypic ratio of monohybrid cross for trait B, what would be the phenotypic ratio of a dihybrid cross involving traits A and B?a)xyb)x + yc)x2 + y2d)(xy)2Correct answer is option 'A'. Can you explain this answer?
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