At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.
此时每条

由一



构成,这两条联合的

称为四分
。
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The so-called photic sneeze reflex, AKA the Autosomal Cholinergic Helio-Ophthalmic Outburst, abbreviated" ACHOO" … yes, seriously… is experienced by about 1 in 4 people, leading scientists to believe it is genetically heritable.
所谓的“强光喷嚏反射”,又称常染色

能性赫里奥眼突出症,简称“Achoo”…
的,讲真… 大约有四分之一的人经历过,这使得科学家相认

会遗传的。