A lovely photo of a flea:
Cells of a plant:
My cheek cells....
Organism in a drop of salt water... and an air bubble....:
For extra credit:
Since the mother dog has yellow pigment and had black and yellow pigment offsprings,
She might be Aa or aa. Since the ratio of the puppies' phenotype 1:1, the father dog should accordingly be aa or Aa.
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