One blind puppy was born in a sighted dog from crossing with the same dog? (normal vision (A) is the dominant sign).

One blind puppy was born in a sighted dog from crossing with the same dog? (normal vision (A) is the dominant sign). Identify the genotypes of the dogs according to the “blind / sighted” characteristic.

Since the blind puppy was born from the crossing of two sighted dogs, it means that both parents had the recessive gene for blindness, the genotypes of the parents were Aa.
Answer: mother – Aa, father – Aa, puppy – aa.

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