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Which of these genotypes are of homozygo...

Which of these genotypes are of homozygous individuals ?

A

AABBCC

B

AAbbCC

C

AABBcc

D

All of these genotypes

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the given genotypes are homozygous individuals, we need to understand the definition of homozygosity in genetics. ### Step-by-Step Solution: 1. **Define Homozygous Individuals**: - Homozygous individuals have two identical alleles for a particular gene. This means that both alleles can either be dominant (e.g., AA) or recessive (e.g., aa). 2. **Analyze the Given Genotypes**: - The genotypes provided are: - A A - B C - A A b b c c - a a b c - a b c 3. **Identify Homozygous Genotypes**: - **A A**: This is homozygous because both alleles are the same (dominant). - **B C**: This is not homozygous because it consists of two different alleles (B and C). - **A A b b c c**: This contains homozygous pairs (A A, b b, and c c), as both alleles for A, b, and c are the same. - **a a b c**: This is partially homozygous (a a is homozygous), but b and c are not paired, making it not fully homozygous. - **a b c**: This is not homozygous at all since all alleles are different. 4. **Conclusion**: - The genotypes that are homozygous are: - A A - A A b b c c - Therefore, the correct answer is that the genotypes A A and A A b b c c are homozygous. ### Final Answer: The homozygous individuals among the given genotypes are **A A** and **A A b b c c**.
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