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Openai/6968d403-be50-8011-ae18-178299cf1859
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==== 優勢(dominant)・劣勢(recessive)は、 ==== * 表現型として「見えるか/見えないか」 * どちらが上・下かという強さの概念ではない という、論理的な分類。 例えば A(優性)と a(劣性)があるとき、 * AA → 表現型A * Aa → 表現型A * aa → 表現型a これは 不等式や連続量ではなく、条件分岐に近い。 <syntaxhighlight>if 遺伝子型にAが含まれる → Aが出る else → aが出る </syntaxhighlight> この意味で「優勢・劣勢」は スイッチ的な定義であって、数値ではない。
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