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来源:雅诚德英语网
They just need to carry the recessive mutation. So it's not uncommon for white bears to be born to black parents.
黑熊父母的皮毛不必是白色的,他们只需携带隐性突变基因即可,因此黑熊父母生出小白熊并非特别的难事。
They just need to carry the recessive mutation. So it's not uncommon for white bears to be born to black parents.
黑熊父母的皮毛不必是白色的,他们只需携带隐性突变基因即可,因此黑熊父母生出小白熊并非特别的难事。