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The Punnett square is a tabular summary of possible combinations of maternal alleles with paternal alleles. [9] 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.
Punnett square blood types: Image title: Punnett square of the possible genotypes and phenotypes of children given combined genotypes and phenotypes of their mothers (rows) and fathers (columns) shaded by phenotypes (A: amber, B: blue, AB: green and O: grey) by CMG Lee.
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When completing a simple Mendelian Punnett square, it is standard convention to not use "X" or "Y" - these letters should be reserved for representing sex chromosomes only - it can be confusing, especially when one goes further into using the Punnett square for sex-linked traits.
Punnett squares for each combination of parents' colour vision status giving probabilities of their offsprings' status, each cell having 25% probability in theory. Normal text denotes a person (or chromosome from a person) who has normal colour vision and no defective gene, italics: has normal colour vision and a defective gene, and bold: is ...
English: A Punnett Square showing a Bb x Bb cross for eye colour. Here, two heterozygous brown-eyed parents produce 25% homozygous dominant brown-eyed offspring, 75% heterozygous brown-eyed offspring, and 25% homozygous recessive blue-eyed offspring. Notice that, even though both parents are brown-eyed, they may still produce blue-eyed offspring.
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