Two genes, A and B, are found in the same chromosome. One chromosome has alleles A and B, while its homolog has alleles a and b. If genes A and B are so closely linked that the recombination frequency is 0%, only AB and ab gametes will be produced during meiosis.

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If the recombination frequency is 0%, it means that no crossing over between A and B alleles and a and b alleles occurred during meiosis. Therefore, the alleles will remain in their original combination on the two homologous chromosomes, resulting in the production of AB and ab gametes only.

Two Genes, a and B, Are Found in the Same