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Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

Which characteristics must an object possess in order to be considered alive?

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?