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一、孟德尔定律中性状分离比实现的基本条件根据分离规律,具有相对性状的纯质亲本杂交,其F1全部表现显性性状,F1自交后代性状分离比为3:l.但是,这种性状分离比例的实现是有条件的,这些条件是:(1)双亲必须是纯合的2倍体;(2)等位基因的相互作用属于完全显性;(3)F1产生两种类型配子,其数目相等,活力一样;(4)F1自交时,两种类型的配子彼此结合的机会均等;(5)F1自交后代全部处于相同的发育条件下,各种基因的个体成活率相同;(6)实验群体数量较大.
A, Mendel's law, the basic conditions to achieve the separation of traits According to the separation rules, with relative traits of pure parental hybrids, F1 all showed dominant traits, F1 selfing offspring trait separation ratio of 3: l However, this The fulfillment of trait separation is conditional upon: (1) the parents must be homozygous diploid; (2) the allelic interactions are completely dominant; (3) F1 produces two types of gametes (4) The chances of the two types of gametes binding to each other are equal during F1 selfing; (5) F1 selfing offspring are all under the same developmental conditions, and the survival rates of all the genes are the same ; (6) a large number of experimental groups.