In dogs wire hair (D) is dominant over smooth hair (d) . If two wire haired dogs produce a smooth haired pup , the genotypes of the parent?

In dogs wire hair (D) is dominant over smooth hair (d) . If two wire haired dogs produce a smooth haired pup , the genotypes of the parent?
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Answer :

Both parents are Dd.  They express the dominant gene but carry the recessive one, so there's a 25% chance that the pup will express the recessive one.  If either parent was DD, then it would be impossible to produce a pup that expresses the recessive gene.
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