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Illustrations for Bob-Tail Boxers

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Illustration I:
The expectations from heterozygous bob-tail x normal tail crosses. Half the puppies should have bob-tails and half will have normal tails. Half-shaded boxes indicate the bob-tail heterozygotes (Bob/+) and the open boxes those with the normal long tail (+/+).

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Illustration II:
The expectations from intercrosses of bob-tail heterozygotes. 75 percent of the progeny should have bob-tails - if the homozygotes are born and resemble the heterozygotes; the homozygote should comprise 33 percent, or 1/3, of those puppies with bob-tails. The bob-tail homozygotes (Bob/Bob) are indicated by fully-shaded boxes.

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Illustration III:
The expectations from homozygous bob-tail x normal tail crosses. All the puppies should have bob-tails.

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