| 单词 | null allele |
| 释义 | null allelenull allele[′nəl ə‚lēl]null allelenull alleleA segment of DNA which is not known to encode a protein product.null allelea form of a gene whose product is either absent at the molecular level, or is present but has no measurable phenotypic function. For example, in a heterozygote with INCOMPLETE DOMINANCE one gene form is a ‘null allele’ and is inactive, while the other allele is unable to compensate for the null allele and so produces an intermediate phenotype. |
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