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What is the expected genotypic ratio of a monohybrid cross?
What is the expected genotypic ratio of a monohybrid cross?
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Q1
What is the expected genotypic ratio of a monohybrid cross?
1:1
3:1
1:2:1
9:3:3:1
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The expected genotypic ratio of a monohybrid cross is 1:2:1, representing the combinations of alleles.
Questions & Step-by-step Solutions
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Q: What is the expected genotypic ratio of a monohybrid cross?
Solution:
The expected genotypic ratio of a monohybrid cross is 1:2:1, representing the combinations of alleles.
Steps: 8
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Step 1: Understand what a monohybrid cross is. It involves one trait with two alleles (e.g., tall and short plants).
Step 2: Identify the alleles. Let's say 'T' is the dominant allele (tall) and 't' is the recessive allele (short).
Step 3: Set up the parental generation. For example, one parent is homozygous dominant (TT) and the other is homozygous recessive (tt).
Step 4: Perform the cross. Combine the alleles from each parent: TT x tt.
Step 5: Determine the possible genotypes of the offspring. All offspring will be Tt (heterozygous).
Step 6: If you cross two heterozygous parents (Tt x Tt), the possible genotypes are: TT, Tt, and tt.
Step 7: Count the combinations: 1 TT, 2 Tt, and 1 tt.
Step 8: Write the genotypic ratio. This gives you a ratio of 1:2:1.
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