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Test cross diagram to determine if a black sheep is heterozygous dominant or homozygous dominant.

Diagram showing a test cross to determine if a black sheep is heterozygous dominant (Bb) or homozygous dominant (BB), crossed with a known homozygous recessive (bb) white sheep, illustrating possible phenotypic ratios.

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Show Answer Key & Explanations Step-by-step solution for: Test cross worksheet

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- If the black sheep is homozygous dominant (BB), all offspring will be black (Bb). The phenotypic ratio is 100% black.
- If the black sheep is heterozygous dominant (Bb), half the offspring will be black (Bb) and half will be white (bb). The phenotypic ratio is 1:1 (black:white).

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