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In a genetic cross, if the ratio of phenotypes in the offspring is 9:3:3:1, what
In a genetic cross, if the ratio of phenotypes in the offspring is 9:3:3:1, what type of cross was performed?
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In a genetic cross, if the ratio of phenotypes in the offspring is 9:3:3:1, what type of cross was performed?
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A 9:3:3:1 ratio indicates a dihybrid cross involving two traits.
Questions & Step-by-step Solutions
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Q
Q: In a genetic cross, if the ratio of phenotypes in the offspring is 9:3:3:1, what type of cross was performed?
Solution:
A 9:3:3:1 ratio indicates a dihybrid cross involving two traits.
Steps: 5
Show Steps
Step 1: Understand what a phenotype is. A phenotype is the observable traits of an organism, like color or shape.
Step 2: Know what a genetic cross is. A genetic cross is when two organisms are bred to see how their traits combine in the offspring.
Step 3: Learn about the ratio 9:3:3:1. This ratio shows how many offspring have different combinations of traits.
Step 4: Recognize that a 9:3:3:1 ratio comes from a dihybrid cross, which involves two different traits.
Step 5: Remember that in a dihybrid cross, each parent contributes two alleles for each trait, leading to four possible combinations in the offspring.
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