Punnett Square?

How to set up a punnett square using dihybrid cross showing both the genotypic and phenotypic ratio?

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  • 1 decade ago
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    thats a big square and a lot of counting so be careful when counting.

    The genotype ratio of a dihybrid cross is 1:8:3:3:1

    The phenotype ratio of a dihybrid cross is 9:3:3:1

  • 1 decade ago

    Figure out what the different types of gamates each parent can make and put one listed at the top and one listed going down on the side. Then you just simply add them together at the intersecting square. Next to get the phenotype of each, you have to see if what is a dominant trait and what are recessives.

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