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WwDd×wwdd; WWdd×WWdd; WwDd×wwDD; WwDd×WWDD.
WwDd×wwdd WWdd ×wwdd WwDd ×wwDD WwDd ×WWDD
对黄色(a)为显性,盘状 对球状(b)为显性,两对基因独立遗传。若让基因型为AaBb的白色盘状南瓜与“某南瓜”杂交,子代表现型及其比例如图所示,则“某南瓜”的基因型为( ) A.AaBbB.Aabb aaBb aabb
WwDd×wwDD WwDd×wwdd WWdd×WWdd WwDd×WWDD
WwDd×wwdd WWDd×WWdd WwDd×wwDD WwDd×WWDD
WwDdxwwdd WWddxWWdd WwDdxwwDD WwDdxWWDD
WwDd×wwdd WWDd×WWdd WwDd×wwDD WwDd×WWDD
WwDd×wwdd WWdd×WWdd WwDd×wwDD WwDd×WWDD
WwDd×wwdd WWDd×WWdd WwDd×wwDD WwDd×WWDD
对黄色(a)是显性,盘状 对球状(b)是显性,这两对相对性状独立遗传。白色盘状(AABB)和黄色球状(aabb)的南瓜杂交获得F.1,F.1再自交产生F.2。在F.2中,白色盘状南瓜应占F.2总数的 A.1/16 B. 3/16 1/2 9/16
WwDd×wwdd WWDd×WWdd WwDd×wwDD WwDd×WWDD
WWdd×WWdd WwDd×wwdd WwDd×wwDD WwDd×WWDD