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In guinea pigs, rough coat (R) is dominant over smooth coat (r) and black (B) is...

In guinea pigs, rough coat (R) is dominant over smooth coat (r) and black (B) is dominant over white (b). R and B are independent genes. Cross a homozygous rough black animal with a smooth white one. What are the genotypes and phenotypes of the offspring? Choose any two offspring and cross them, determining the genotypes and phenotypes of the next generation.

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Genotype ratio - 1:2:2:4:1:2:1:2:1

Phenotype ratio - 9:3:3:1

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