1. What Is A Dihybrid Cross Punnett Square?

A dihybrid cross examines the inheritance of two different traits simultaneously. The Punnett square is a grid used to predict the genotypes of offspring from parental genotypes.

2. How Does The Calculator Work?

The calculator uses the dihybrid cross formula:

Where:

• A_ and B_ represent dominant alleles
• aa and bb represent recessive homozygous genotypes
• The cross calculates expected genotypic ratios

Explanation: The calculator determines all possible gamete combinations from both parents and predicts offspring genotypes and phenotypes.

3. Importance Of Dihybrid Cross Analysis

Details: Dihybrid crosses are fundamental in genetics for understanding independent assortment, predicting trait inheritance patterns, and studying genetic linkage.

4. Using The Calculator

Tips: Enter valid genotypes for both parents (e.g., AaBb, AABB, aaBb). Use standard genetic notation with uppercase for dominant and lowercase for recessive alleles.

5. Frequently Asked Questions (FAQ)

Q1: What is the expected phenotypic ratio for a dihybrid cross?
A: For heterozygous parents (AaBb × AaBb), the expected phenotypic ratio is 9:3:3:1.

Q2: How many squares are in a dihybrid Punnett square?
A: A standard dihybrid cross Punnett square has 16 squares representing all possible offspring genotypes.

Q3: What does independent assortment mean?
A: Independent assortment means that genes for different traits segregate independently during gamete formation.

Q4: Can this calculator handle linked genes?
A: No, this calculator assumes genes are unlinked and assort independently according to Mendelian genetics.

Q5: What if parents have homozygous genotypes?
A: The calculator works with any combination of homozygous and heterozygous genotypes for both traits.