(Of a gene or genetic sequence) present in a genome in only one copy.
- In each species, we determined DNA sequence variation of five single-copy genes located in chromosomal regions with either high or low recombination rate.
- The presence of one copy in each of the three homoeologous chromosomes suggests that they were also present as single-copy genes in the common ancestor of the A, B, and D genomes.
- We have only used provably single-copy genes from completed genomes, and therefore this analysis is different to most other analyses in this respect.
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