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In hamsters, black coat colour is dominant to white. The genotypes of two hamsters is as follows. Bb(black) xx (bb) white. What is the predicted ratio of black to white offspring from this cross ?



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nicholasjk17

Answer: 1. Possible genotypes of offspring: - When the Bb and bb genotypes are crossed, the Punnett square can be set up as follows:    From the Punnett square, we see that all offspring will have the genotype Bb (heterozygous for black coat color).  2. Predicted ratio of black to white offspring: - Since all offspring will have the Bb genotype, all the offspring will have black coat color. - Therefore, the predicted ratio of black to white offspring from this cross is 100% black (Bb genotype).  In conclusion, all the offspring from this cross are predicted to have black coat color with a ratio of 1:0 (black:white)

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