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58问答库 > 鉴定一株高茎豌豆是否是纯合子；不断提高抗病小麦纯合体的比例。用什么方法好

鉴定一株高茎豌豆是否是纯合子；不断提高抗病小麦纯合体的比例。用什么方法好

2025-03-15 13:58:01

推荐回答（1个）

回答（1）：

我们假设豌豆高茎为显性H，矮茎为隐形h。若为显性纯合子HH，则和hh侧交子代基因型为全为Hh，表现型都为高茎；若为显性杂合子Hh，则和hh侧交子代基因型一半为Hh，表现型为高茎，另一半为hh，表现型为矮茎。由此可鉴定一株高茎豌豆是否是纯合子。要提高抗病小麦纯合体的比例需要连续自交，即自交子代表现型为抗病的继续自交。

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