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Gaokao Biology Practice Question

6.(6分)假设在特定环境中,某种动物基因型为BB和Bb的受精卵均可发育成个体,基 因型为bb的受精卵全部死亡。现有基因型均为Bb的该动物1000对(每对含有1个父本 和1个母本),在这种环境中,若每对亲本只形成一个受精卵,则理论上该群体的子一代 中BB、Bb、bb个体的数目依次为()

  1. A.250、500、0
  2. B.250、500、250
  3. C.500、250、0
  4. D.750、250、0

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