1. What is a 16 Punnett Square?

A 16 Punnett Square is a genetic diagram that predicts the genotype distribution of offspring from two parents each heterozygous for two traits (dihybrid cross). It shows all 16 possible combinations of alleles that can result from the cross.

2. How Does the Calculator Work?

The calculator generates all possible gametes from each parent's genotype and combines them in a 4×4 grid:

The square then shows all combinations of these gametes from both parents.

3. Importance of Punnett Squares

Details: Punnett squares are fundamental tools in genetics that help predict the probability of offspring inheriting particular genotypes and phenotypes.

4. Using the Calculator

Tips: Enter genotypes for both parents using standard notation (e.g., AaBb). The calculator assumes standard diploid inheritance with two alleles per gene.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between 4 and 16 square Punnett squares?
A: A 4-square predicts single trait inheritance (monohybrid cross), while 16-square predicts two trait inheritance (dihybrid cross).

Q2: What's the expected phenotypic ratio for AaBb × AaBb?
A: The classic 9:3:3:1 ratio (9 dominant for both, 3 dominant A/ recessive b, 3 recessive a/ dominant B, 1 recessive for both).

Q3: Can I use this for more than two traits?
A: No, this calculator is specifically for two traits. More traits require more complex calculations.

Q4: What if my genotypes have different letters?
A: The calculator works with any allele letters as long as the format is correct (e.g., CcDd).

Q5: How accurate are Punnett square predictions?
A: They show theoretical probabilities. Actual results may vary due to factors like genetic linkage or mutations.