Q103: Recombination percentage in a diploid cannot exceed - Principles of Fish Genetics and Breeding - Fish Genetics and Breeding- ICAR JRF/SRF 2024 | Agrigyan

• Recombination Limit between Two Loci:
• In diploid meiotic recombination:
• Crossing over occurs at the four-strand stage involving non-sister chromatids. Each single crossover event involves only two of the four chromatids, resulting in $50\%$ recombinant and $50\%$ parental gametes.
• Even with multiple crossovers between distant loci, odd and even crossover configurations average out to equal frequencies of recombinant and non-recombinant gametes.
• Thus, the theoretical and empirical maximum recombination frequency between any two linked or unlinked loci cannot exceed $50\%$ (which is indistinguishable from independent assortment on separate chromosomes).
• nalysis:
• (50%): Correct.

Correct option: (4) 50%