[問題] 一題生物
人類的紅綠色盲為遺傳性疾病,請問父親正常而母親為紅綠色盲,
那他們所生的小孩,哥哥是色盲,妹妹正常的機率是多少?
a.1/2 b.1/4 c.3/4 d.1/8
答案給b.1/4
但我算是1/8....請高手說明為何是1/4呢? 感謝!!!
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