Punnett squares
Presentation
•
Science
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10th - 12th Grade
•
Easy
+1
Standards-aligned
Jake Spruhan
Used 4+ times
FREE Resource
8 Slides • 8 Questions
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Punnett Squares
Biology meets probability
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What are they?
Punnett squares were devised by and named for Reginald Punnett. They show possible combinations of maternal and paternal alleles.
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What are the odds?
In the Punnett square to the right, the possible allele combinations are shown. They are:
50% chance of Yy genotype
50% chance of yy genotype
So, if an offspring were to be produced by these parents, these are the possible alleles that the offspring will inherit.
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Multiple Choice
For this Punnett square, what are the chances of the offspring inheriting the Aa genotype?
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Multiple Choice
For this Punnett square, what are the chances that an offspring will have a homozygous recessive trait?
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Multiple Choice
For this Punnett square, which genotype will an offspring most likely inherit?
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Two-trait Punnett Squares
Punnett squares can also represent crosses of two traits, where pairs of alleles from each parent will be passed on to offspring.
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Fill in the Blanks
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Open Ended
For this Punnett square: if C = checkered, c = striped, P = purple and p = pink, what are the chances that the offspring will be checkered and purple? (Remember - capital alleles are dominant)
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Open Ended
For the Punnett square, write down all possible genotypes and their chances of occurring in offspring.
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Open Ended
For the Punnett square, write down all possible genotypes and their chances of occurring in offspring.
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Poll
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Punnett Squares
Biology meets probability
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