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Question: please i need help and i dont understand what it...

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In the domestic chicken, a decorative head feature called the comb may be single, walnut, pea, or rose, according to the combination of alleles of two unlinked genes present. Genotype R P gives a walnut comb. rrP gives a pea comb; R pp gives a rose comb; while rr;pp fowl have a single comb. hat comb types are expected in the F1 generation from a cross between pure-breeding A. W rose and pea flocks? What phenotypic ratio is expected in the F2 generation? B. W Walnut and Single flocks? hat comb types are expected in the F1 generation from a cross between pure-breeding What phenotypic ratio is expected in the F2 generation?

please I need help. and I dont understand what it means by true breeding

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