Question

單純想睡覺

想問第三題的基因型比例怎麼算比較快以及機率

〔答案〕 圓形種子黃色豆莢,高莖→(RR·Rr)(gg) (1.) → zx_xZ
3. 有兩個親代,其中一個基因型為YyRR,另一個為yyRr,請問F的基因型幾種?求F1
基因型比例?請問生出F基因型為yyRr的機率為?
[答案]P:YYRRxyyRr
FR基因型種類:2×2=4種
YRyRyRyr
F. 基因型比例):(1:1)(1:1)=1:1:1:1(速算)
x
1 1
yyRr 的機率 = 2-4
典

Answer 1

qn

基本上計算跟圖片中一樣
但是畫成棋盤方格比較好理解

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