問題詳情
40.果蠅的眼色由兩對基因所控制，B、b 位於第二對染色體上，S、s 位於第三對染色體上。若同時具有顯性的 B 及 S 基因，果蠅的眼色為紅色；若僅具顯性 B 基因，果蠅眼色為猩紅色；若僅具顯性 S 基因，果蠅眼色為棕色；若同時不具顯性 S 及 B 基因，果蠅的眼色為白色。下列哪些雜交會產生比例為紅眼：猩紅眼：棕眼：白眼 ＝ 3：1：3：1 之後代？
(A) ♂BbSs ×♀bbSS
(B) ♂BbSs ×♀bbSs
(C) ♂BBSs ×♀bbSs
(D) ♂BbSs ×♀Bbss
(E) ♂bbSs ×♀BbSs
(A) ♂BbSs ×♀bbSS
(B) ♂BbSs ×♀bbSs
(C) ♂BBSs ×♀bbSs
(D) ♂BbSs ×♀Bbss
(E) ♂bbSs ×♀BbSs
參考答案
無參考答案
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