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单词 overdominance
释义

Definition of overdominance in English:

overdominance

noun ˌəʊvəˈdɒmɪnəns

  • 1Excessive dominance.

  • 2Genetics. A condition in which a heterozygote (having a copy of two different alleles of a gene) has a phenotype which falls beyond the extremes of the range represented by the corresponding homozygotes (having two copies of one or other of the alleles).

Origin

Early 20th century. From over- + dominance.

Definition of overdominance in US English:

overdominance

nounˌəʊvəˈdɒmɪnəns

  • 1Excessive dominance.

  • 2Genetics. A condition in which a heterozygote (having a copy of two different alleles of a gene) has a phenotype which falls beyond the extremes of the range represented by the corresponding homozygotes (having two copies of one or other of the alleles).

Origin

Early 20th century. From over- + dominance.
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更新时间：2025/12/15 10:34:01