Mendel's laws Two general laws of inheritance formulated by the Austrian monk GregorMendel. Re-expressed in modern terms, the first law, of segregation, is that the two members of a gene pair segregate from each other during meiosis, each gamete having an equal probability of obtaining either member of the gene pair. Re-expressed in modern terms, the second law, of independent assortment, is that different segregating gene pairs behave independently. This second law is not universal, as was originally thought, but applies only to unlinked or distantly linked pairs (see linkage). At the time of Mendel, genes had not been identified as the units of inheritance: he considered factors of a pair of characters segregating and members of different pairs of factors assorting independently.
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Painter, Eleanor (1890–1947) , pair / pe(ə)r/ • n. a set of two things used together or regarded as a unit: a pair of gloves. ∎ an article or object consisting of two joined or cor… Independent Assortment , independent assortment (random assortment) The random distribution in the gametes of separate genes. If an individual has one pair of alleles A and a… Gene , The gene is the physical unit of heredity. For each physical trait—such as eye color, height, hair color—a person inherits two genes or two groups of… Genetics , genetics, scientific study of the mechanism of heredity. While Gregor Mendel first presented his findings on the statistical laws governing the trans… Labium , labium (pl. labia) 1. The lower lip in the mouthparts of an insect, which is used in feeding and is formed by the fusion of a pair of appendages (the… Genetic Map , genetic map The linear arrangement of mutable sites on a chromosome, deduced from genetic recombination experiments. The percentage of recombinants i…
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