Question

Dihybrid Punnett Square Practice Problems Directions: Answer the questions that follow in your science notebook. For a particular plant, the allele for tall (T) is dominant over the allele for short (t). For the same plant, the allele for colored flowers (G is dominant over white flowers (c). A farmer as shown in the Punnett Parent 1 TtC 2. For a particular rodent, black fur (B) is dominant over brown fur (b), and a long tail (L) is dominant over a short tail (). Create a Punnett square that shows the genotypes of all the possible offspring that could result from the breeding of two of the rodents that are us for both traits Genotype for the cross Key B- b. L- a. What ratio of genotypes would result? Show your work. b. What ratio of phemotypes would result? Show your work.

Answer 1

Answer 1: The principles revealed is called a dihybrid cross, in which two characters segregating simultaneously would be the product of their independent occurrence. The two characters are plant height and flower color. Here, T as Tall dominates t as short recessive to determine plant height , and C as Colored flower for dominates the c as white flower to determine flower color. The phenotypic and genotypic ratio is shown in the below figure:

Answer 2: The two characters are, rodent's fur coat color and tail length. Here, B as black dominates b as recessive to determine fur coat color, and L as long tail for dominates the l as short tail to determine tail length. The phenotypic and genotypic ratio is shown in the below figure:

Answer 3: The two characters are, rodent's fur coat color and tail length. Here, B as black dominates b as recessive to determine fur coat color, and L as long tail for dominates the l as short tail to determine tail length. When male hetrozygous BbLl and female homozygous BBll were crossed with each other, the phenotypic and genotypic ratio is shown in the below figure: