null adj. 1.無效力的,無束縛力的。 2.無效的,無用的,無益的;無價值的。 3.沒特征[個性]的,沒表情的。 4.〔罕用語〕不存在的,沒有的;零(位)的;空的。 n. 【數學】零,零位;空;【無線電】零訊號,微弱訊號。 a null indicator 零示器;零位指示器。 the null method 衡消法。 null and void 【律】無效;失效(This check is null and void. 本支票無效)。 vt. 使無效。
Among all the microsatellite loci , 46 . 7 % of the loci and 11 . 7 % of the alleles were null alleles . separate genetic linkage maps were constructed for the female and male parents 微衛星位點中有大量的無效等位基因( nullallele ) ,占所有位點的46 . 7 % ,是所有等位基因的11 . 7 % 。
In this article , we review isolation methods , developmental status and genetic characteristics of microsatellites , and their applications in studies on population study , pedigree analysis , assessment of genetic diversity , and construction of genetic maps in the marine mollusks , and analyzed the causes resulting to null allele , stutter bands , short allele dominance and allelic dropout , and their effects on genotyping of microsatellite 本文對海洋貝類微衛星分離方法、開發現狀、遺傳學特性以及在種群遺傳、家系分析、遺傳多樣性評價等方面的最新研究進展進行了綜述,并分析了微衛星分析中無效等位基因、 “結巴”帶、短等位基因顯性和等位基因“擴增丟失”現象的產生原因以及對微衛星基因型判讀帶來的影響。
百科解釋
A null allele is a mutant copy of a gene that completely lacks that gene's normal function. This can be the result of the complete absence of the gene product (protein, RNA) at the molecular level, or the expression of a non-functional gene product.