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Most of the litter shown will be black, most likely only one mouse will be white furred.

Histrionicus

The given question is incomplete as it lacks the image with the question, however, the correct image is attached with the answer:

Two black-fur mice are bred and have the litter shown in the attached image produces the white-fur offspring that most likely explained by - That the parents are heterozygous for both fur color gene

There is all the parent mice are black fur which means either dominant for black or heterozygous.

  • As we know the dominant allele masked the recessive allele in heterozygous conditions.
  • A recessive trait only expresses itself if both alleles are recessive.
  • In this case, this is only possible if mice are heterozygous as they are both black
  • the parents must have one white gene/one black gene because the white rat would have to get two white genes.

Thus, the correct explanation is - That the parents are heterozygous for both fur color gene

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