If a plant with genotype Aa is crossed with another plant of genotype Aa, what is the probability of obtaining a homozygous dominant offspring?

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Q: If a plant with genotype Aa is crossed with another plant of genotype Aa, what is the probability of obtaining a homozygous dominant offspring?

Solution: The cross Aa x Aa results in a 1/4 chance of AA (homozygous dominant), which is 25%.

Steps: 7

Step 1: Identify the genotypes of the parent plants. Both plants have the genotype Aa.
Step 2: Set up a Punnett square to visualize the possible combinations of alleles from the parents.
Step 3: Fill in the Punnett square. The possible combinations from Aa x Aa are: AA, Aa, Aa, and aa.
Step 4: Count the number of homozygous dominant offspring (AA) in the Punnett square. There is 1 AA.
Step 5: Count the total number of offspring combinations in the Punnett square. There are 4 combinations (AA, Aa, Aa, aa).
Step 6: Calculate the probability of obtaining a homozygous dominant offspring (AA) by dividing the number of AA by the total combinations: 1/4.
Step 7: Convert the fraction to a percentage: 1/4 equals 25%.