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实验6 连锁 (一)实验器材 1 营养管的真实遗传野生型雄果蝇;1培养管的卷翅、黑檀体处女雌(图6(a));孵化箱(2 5℃);2培养管的培养基(每管贴一空白标签);其余器材见实验3。注释: 实验5中讨论过的决定翅型(长或残翅)和体色(灰或黑檀体)的基因,表现独立分配,因为它们位于不同的染色体。但是,如果一个杂交涉及同一染色体上两个不同基因的两种等位基因,减数分裂时这两个基因就有一起进入一个细胞的倾向。在这种情况下,我们说这两个基因是连锁的。 (二)实验步骤 1.应用该实验准备的两个果蝇品系,仿实验5的实验步骤进行操作。
EXPERIMENT 6 (a) Experimental equipment 1 True genetic wild-type male Flies for feeding tube; 1 Winged fin, Ebony virgin female (Figure 6 (a)); Incubator (2 5 ° C); 2 Culture Tube culture medium (each tube attached a blank label); other equipment see experiment 3. Note: The genes discussed in Experiment 5 that determine wing type (long or winged) and body color (gray or ebony) exhibit independent distribution because they are located on different chromosomes. However, if one crosses two alleles of two different genes on the same chromosome, there is a tendency for both genes to enter a single cell at meiosis. In this case, we say that these two genes are linked. (B) experimental steps 1. Application of the experiment prepared two fruit flies, imitation experiment 5 experimental steps to operate.