How can you complete the Punnett square below (which shows a cross between two parents whose genes for blood type are AB)?

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Asked by Srosado, Last updated: Nov 09, 2024

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Y. Dawne, Content Blogger, Diploma in Journalism, Amsterdam, Netherlands

Answered Feb 07, 2019

The correct answer to this question is blood type A - 25%, blood type B - 25%, and blood type AB - 50%.

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.

The Punnett square is a tabular summary of possible combinations of maternal alleles with paternal alleles. These tables can be used to examine the genotypical outcome probabilities of the offspring of a single trait (allele), or when crossing multiple traits from the parents.

John Smith

Answered Apr 16, 2017

Allow 1 credit for correctly completing the Punnett square as shown below. All four boxes must be correct to receive this credit. Example of a 1-credit response: A B A AA AB B AB BB Note: The order of the letters in each box does not matter, for example, AB is the same as BA.