1. What is a Punnett Square?

A Punnett square is a diagram that is used to predict the genotype and phenotype combinations of offspring from parental alleles. The 2x2 grid is used for monohybrid crosses (single trait inheritance).

2. How Does the 2x2 Punnett Square Work?

The 2x2 Punnett square shows all possible combinations of parental alleles:

Where:

• Rows represent gametes from one parent
• Columns represent gametes from the other parent
• Each cell shows a possible genotype combination

3. Understanding Monohybrid Crosses

Details: A monohybrid cross examines inheritance of one trait. The 2x2 grid shows possible combinations when each parent contributes one allele.

4. Using the Calculator

Tips: Select genotypes for both parents (AA, Aa, or aa). The calculator will show the Punnett square and probability outcomes.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between genotype and phenotype?
A: Genotype is the genetic makeup (e.g., Aa), while phenotype is the physical expression (e.g., dominant trait).

Q2: What do the letters in the genotypes represent?
A: Letters represent alleles - uppercase for dominant, lowercase for recessive.

Q3: How do I interpret the percentages?
A: They show the probability of offspring having each genotype or phenotype.

Q4: What's a homozygous vs heterozygous genotype?
A: Homozygous has two identical alleles (AA or aa), heterozygous has different alleles (Aa).

Q5: Can this predict actual offspring numbers?
A: No, it shows probabilities - actual results may vary due to random assortment.