1. What is a Trihybrid Cross?

A trihybrid cross examines the inheritance of three different traits simultaneously. It follows Mendelian genetics principles and produces 64 possible genotype combinations in the offspring (8 gamete types from each parent).

2. How Does the Calculator Work?

The calculator generates all possible gametes for each parent (8 each) and then combines them to show all possible offspring genotypes:

Where:

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

3. Understanding the Results

Details: The results show all possible genotype combinations and their frequency in the offspring generation. This helps predict inheritance patterns for three traits.

4. Using the Calculator

Tips: Enter 6-letter genotypes for each parent (e.g., AaBbCc). The calculator assumes standard Mendelian inheritance with independent assortment.

5. Frequently Asked Questions (FAQ)

Q1: Why 64 possible genotypes?
A: With three heterozygous traits, each parent can produce 8 different gametes (2^3), resulting in 64 possible combinations (8×8).

Q2: What's the phenotypic ratio?
A: For three heterozygous traits with complete dominance, the classic ratio is 27:9:9:9:3:3:3:1.

Q3: Does this assume independent assortment?
A: Yes, this calculator assumes the three genes are on different chromosomes or far enough apart to assort independently.

Q4: Can I use lowercase letters?
A: Yes, but they will be converted to uppercase as alleles are case-insensitive in this calculator.

Q5: How are genotypes sorted?
A: Alleles are sorted alphabetically (e.g., aA becomes Aa) for consistent display.