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PP pelthy w guinea pigs rough hair (R) is domini respect to white (b. These gen chromosome as the focus for hair haic texture
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RrBb (black, rough) x rrbb (white, smooth) --Parents

rb
RB RrBb (rough, black)--1/4
Rb Rrbb (rough, white)-1/4
rB rrBb (smooth, black)-1/4
rb rrbb (smooth, white)--1/4

Both genotypic and phenotypic raito = 1:1:1:1

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