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Gaokao Biology Practice Question

果蝇 $(2 \mathrm{n}=8)$ 杂交实验中, $\mathrm{F}_{2}$ 某一雄果蝇体细胞中有 4 条染色体来自 $\mathrm{F}_{1}$ 雄果蝇, 这 4 条染色体全部来自亲本 (P) 雄果蝇的概率是 ( ）

  1. A.$1 / 16$
  2. B.$1 / 8$
  3. C.$1 / 4$
  4. D.$1 / 2$

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