1. What is a Dihybrid Cross?

A dihybrid cross examines the inheritance of two different traits simultaneously. It demonstrates Mendel's principle of independent assortment, showing how genes for different traits separate independently during gamete formation.

2. How Does the Calculator Work?

The calculator generates all possible gamete combinations from each parent's genotype and combines them in a Punnett square:

Where:

• Each parent contributes one allele for each gene
• Gametes contain all possible combinations of alleles
• Offspring genotypes are combinations of parental gametes

3. Understanding the Results

Details: The Punnett square shows all possible genotype combinations. Phenotype ratios can be determined from the genotypes based on dominance relationships.

4. Using the Calculator

Tips: Enter genotypes as four letters (e.g., AaBb). Capital letters typically represent dominant alleles, lowercase for recessive.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between monohybrid and dihybrid crosses?
A: Monohybrid examines one trait, dihybrid examines two traits simultaneously.

Q2: What's the expected phenotypic ratio for AaBb × AaBb?
A: 9:3:3:1 ratio for complete dominance (9 dominant for both traits, 3 dominant for first/recessive for second, etc.)

Q3: What if genes are linked?
A: This calculator assumes independent assortment. Linked genes would show different ratios.

Q4: Can I use this for more than two traits?
A: No, this is specifically for dihybrid (two-trait) crosses.

Q5: How do I determine phenotype from genotype?
A: You'll need to know dominance relationships for each gene separately.