13. 绵羊的有角与无角是一对相对性状，由常染色体上一对等位基因控制。杂合子中，雄羊表现为有角，雌羊表现为无角。在一个基因频率相对稳定的种群中有角羊占25%。下列叙述正确的是
种群基因频率 · 历年高考生物真题与解析
本页汇总 高考真题检索 的「种群基因频率」高考生物真题共 1 道，覆盖 2026 年，最常出题型为 单选题；含完整答案与解析。
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