A pure-breeding black coat cat was crossed with a hybrid black coat cat. (a)Represent the diagrammatically .(b)What percentage of the offspring
Use a Punnett square.
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(a) To represent the cross between a pure-breeding black coat cat (BB) and a hybrid black coat cat (Bb), we can use a Punnett square. We'll designate the pure-breeding black cat as B, and the hybrid black cat as b.
B B
b | Bb Bb
In the Punnett square, the vertical column represents the possible gametes from the pure-breeding black cat (BB), and the horizontal row represents the possible gametes from the hybrid black cat (Bb). We can see that all the offspring will have the genotype Bb.
(b) To determine the percentage of offspring with a black coat, we need to understand the inheritance pattern of coat color. Assuming that black coat color is dominant over any other colors, the genotype Bb will result in a black coat.
Since all the offspring from this cross will have the genotype Bb, which corresponds to a black coat, the percentage of offspring with a black coat is 100%.
In summary, all the offspring from the cross between a pure-breeding black coat cat and a hybrid black coat cat will have a black coat.