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In the plant genus Triticum there are many different polyploid species, as well as diploid species. Crosses were made between three different species, and hybrids were obtained. The meiotic pairing was observed in each hybrid, and this is recorded in the following table. (A bivalent is two homologous chromosomes paired at meiosis, and a univalent is an unpaired chromosome at meiosis.)
Species crossed to make hybridPairing in hybrid
1. T. turdigum × T. monococcum 7 bivalents + 7 univalents
2. T. aestivum × T. monococcum 7 bivalents + 14 univalents
3. T. aestivum × T. turdigum 14 bivalents + 7 univalents
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