In dogs, black (B) is dominant to chestnut (b), and solid color (S)...?

Sophie

New member
In dogs, black (B) is dominant to chestnut (b), and solid color (S) is dominant to spotted (s). What are the genotypes of the parents that would produce a cross with 3/8 black solid, 3/8 black spotted, 1/8 chestnut solid, and 1/8 chestnut spotted?
 
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