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The inheritance of snail coiling direction as an example of a maternal effect gene.

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In the snails shown in this experiment, the direction of body coiling is controlled by a single pair of genes. D (dextral, or right-handed) is dominant to d (sinistral, or left-handed). The genotype of the mother determines the phenotype of the offspring. A DD or Dd mother will produce dextral offspring and a dd mother will produce sinistral offspring, regardless of the genotypes of the father and of the offspring themselves.
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10 years ago
Thanks for sharing Slight Smile
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