Question

which diagram correctly shows how homozygous alleles are found on homologous chromosomes? aa aa

Explanation:

Step1: Recall Homozygous Definition

Homozygous alleles have identical alleles (e.g., \( AA \) or \( aa \)) on homologous chromosomes. Heterozygous has different alleles (e.g., \( Aa \)).

Step2: Analyze Diagrams

• First diagram: Alleles \( Aa \) (heterozygous) on a single chromosome (not homologous pair context here, but allele type is heterozygous).
• Second diagram: Alleles \( aa \) (homozygous) on what should represent homologous chromosomes (consistent with homozygous definition).

Answer:

The diagram with "aa" (the lower one)