How do you fill in a punnet square?

Answer 1

An example of a punnet square is if you have the heterozygous Bb genotype. The punnet square would have a big B and a little B at the top and on the side. The first square would be BB, the second one would be Bb, the third would be Bb, and the fourth would be bb. the possibility that the child has the bb genotype is 1/4.

Answer 2

A punnet square is used to work of genotypic and phenotypic ratios for different crosses of animals. Therefore in a punnet square you will find the genotypes of the offspring that resulted from the cross (mating).

Answer 3

Take the phenotypes of the two parents and have them above and next to a box:

(say that the mother is AA and the father is Aa)

....A A

A AA AA

a Aa Aa

Genotypic ratio: 2 homozygous dominant: 2 heterozygous: 0 homozygous recessive

Treat it like a multiplication table. Take the allele from the top and the allele from the side to get two alleles in each box. (If the dominant allele is present, have it be first)

Answer 4

To fill in a Punnett square, list the possible alleles from each parent along the top and side of the square. Then, combine the alleles in each box to determine the possible genotypes of the offspring. Finally, calculate the frequencies of each genotype based on the Punnett square outcomes.

Answer 5

Punnet squares are used to predict the allele of the offspring.

Tool used to predict results in Mendelian genetics; shows all the ways in which alleles can combine