Second Division Segregation (SDS) At Biology Glossary

What is it? The allele arrangement (2+2+2+2) in the spores of Ascomycetes with ordered spores that indicates a crossover between a locus and its centromere. A pattern of ascospore genotypes for a gene pair showing that the two alleles segregate into different nuclei only at the second meiotic division, as a result of a single crossover between that gene pair and its centromere; can only be detected in a ordered ascus. See First division segregation

Bio Definition Added By: Kaylee

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