Question:
In a diploid organism, how many genotypes are possible if a gene has two alleles?
In a diploid organism, how many genotypes are possible if a gene has two alleles?
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For a gene with n alleles in a diploid organism, the number of genotypes is \(n(n+1)/2\).
Updated On: Jun 19, 2026
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The Correct Option is A
Solution and Explanation
Step 1: Understanding diploid genotype combinations.
For a single gene with two alleles (A and a), the possible genotypes are: AA, Aa, and aa.
Step 2: Counting genotypes.
There are 3 distinct genotypes in total.
Step 3: Conclusion.
Thus, the number of possible genotypes is 3.
For a single gene with two alleles (A and a), the possible genotypes are: AA, Aa, and aa.
Step 2: Counting genotypes.
There are 3 distinct genotypes in total.
Step 3: Conclusion.
Thus, the number of possible genotypes is 3.
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