测交后代中基因遗传关系判断的规律性

对于两对相对性状，或为自由组合的遗传关系，或为连锁互换的遗传关系，二者必居其一，根据测交后代表现型比例可以判定。三对相对性状遗传关系较两对相对性状复杂，对其中任意两对基因的遗传关系都可用以上规则判定，但对三对基因这个整体来说，多数情况尚不能一次判定。

The regulation measured to hand over the gene in the posterity heredity a relation judgment

For two rightness opposite sex form, or is freedom the heredity of the combination relation, or with each other change for the catena of heredity relation, two necessarily reside it a,…, as to it＇s medium arbitrarily two rightness the heredity of the gene relation all can in order to top the rule judge, but rightness three rightness gene this is whole to say, most the circumstance still can＇ t judge at a time.