first-division segregation ascus pattern

'first-division segregation ascus pattern' can also refer to...


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In ascomycetes, a 4–4 linear order of spore phenotypes within an ascus. This pattern indicates that a pair of alleles (e.g., those controlling spore pigmentation) separated at the first meiotic division, because no crossovers occurred between the locus and the centromere. See ordered tetrad.

Subjects: Genetics and Genomics.

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