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【单选题】

在奶牛育种体系中,由公牛传递的遗传进展约占整个育种体系的( )。

A.
97%
B.
75%
C.
95%
D.
87%
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题目标签:遗传进展公牛
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【多选题】遗传进展受哪些因素影响?

A.
选择强度
B.
选择准确性
C.
遗传变异度
D.
世代间隔

【单选题】Once the king of India fell ill and sent for his doctor. The doctor came, examined him and said, "You will be well again in a few days if you take bull’s (公牛的) milk." The king was very surprised, for ...

A.
Because she was forced to do it.
B.
Because she often washed clothes there.
C.
Because she enjoyed washing clothes there.
D.
Because she wanted the king to notice her.

【单选题】适合于鉴定种公牛的方法为()。

A.
同期同龄女儿比较法
B.
多性状选择
C.
母女对比法
D.
不同后代比较法
E.
公牛指数法