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Sagot :
First, set up the Punnett square using the genotypes of the parents.
The male is bb, so place two b's in the top row. The female is Bb, so place one B in the left column, and one b in the right column.
BB bB
bb bb
Next, fill in the squares of the Punnett square with the possible combinations of the alleles. In the left-hand top square, place a B and a b since the male parent has one B and one b. In the right-hand top square, place a b and a B since the female parent has one B and one b. In the left-hand bottom square, place two b's since both parents have one b. Finally, in the right-hand bottom square, place two b's since both parents have one b.
BB bB
bb bb
Then, calculate the phenotype ratio. The ratio of black fur to white fur is 3:1, since three of the offspring have the black fur allele (BB, Bb, bb) and one of the offspring has the white fur allele (bb).
Black: 3 White: 1
What is the Punnett square?
The Punnett square is a chart used to predict the genotype of a particular cross or breeding experiment. It is named after British geneticist Reginald Punnett, who devised the technique. The square is used to determine the probability of an offspring having a particular genotype. It can also be used to describe the probability of a certain phenotype, such as eye color, appearing in the offspring.
What are Genotypes and Phenotypes?
Genotypes are the genetic makeup of an organism, which is determined by the alleles it carries. These alleles are passed from parents to offspring and can be dominant, recessive, or a combination of both.
Phenotypes are the physical characteristics and traits of an organism, which are determined by the genotype, but can also be influenced by environmental factors.
To know more about Punnett square,
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