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hoang1804031
2 năm trước
gen A nằm trên NST giới tính X không có alen tương ứng trên Y có 5 alen, gen B nằm trên NST thường có 6 alen. ở giới XX vủa quần thể sẽ có tối đa bao nhiêu kiểu gen đồng hợp về gen A và dị hợp về gen B
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