孟德尔的豌豆杂交实验中,将纯种的黄色圆粒(YYRR)豌豆与纯种的

孟德尔的豌豆杂交实验中,将纯种的黄色圆粒(YYRR)豌豆与纯种的绿色皱粒(yyrr)豌豆杂交。得F2种子556粒(以560粒计算)。从理论上推测,F2种子中基因型与其个体数基本相符的是

选项

A

B

C

D

基因型

YyRR

yyrr

YyRr

YyRr

个体数

140

140

315

140

答案

D

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