Punnett Square Probability:
Where:
P = probability (dimensionless)
F = favorable outcomes (dimensionless)
T = total outcomes (dimensionless)
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The Punnett Square probability calculates the likelihood of particular genotype combinations in offspring from parental alleles. It's fundamental in Mendelian genetics and inheritance pattern prediction.
The calculator uses the basic probability formula:
Where:
Explanation: The formula divides the count of desired genetic combinations by all possible combinations in the Punnett square.
Details: Accurate probability calculation helps predict inheritance patterns, genetic counseling, and understanding dominant/recessive trait transmission.
Tips: Enter the number of favorable genotype combinations and total possible combinations from your Punnett square analysis.
Q1: What's the difference between genotype and phenotype probability?
A: Genotype probability refers to genetic makeup chances, while phenotype probability concerns observable trait expression.
Q2: How do I determine favorable outcomes?
A: Count the squares in your Punnett square that match the specific genotype combination you're analyzing.
Q3: What's the maximum probability value?
A: Probability ranges from 0 (impossible) to 1 (certain), or 0% to 100% when expressed as percentage.
Q4: Can this calculator handle dihybrid crosses?
A: Yes, as long as you correctly determine the F and T values from your 16-square dihybrid Punnett square.
Q5: How accurate are these predictions?
A: They're theoretical probabilities - actual offspring ratios may vary due to random fertilization and sample size.