1. What is Trihybrid Cross Probability?

The trihybrid cross probability calculates the chance of specific genotype combinations from three heterozygous gene pairs (AaBbCc × AaBbCc). There are 64 possible combinations in the Punnett square.

2. How Does the Calculator Work?

The calculator uses the probability equation:

Where:

• \( P \) — Probability (dimensionless)
• \( F \) — Number of favorable outcomes (dimensionless)
• 64 — Total possible combinations in trihybrid cross

Explanation: The equation calculates the probability by dividing the number of favorable outcomes by the total possible outcomes (64).

3. Importance of Trihybrid Cross Calculation

Details: Understanding trihybrid crosses helps predict inheritance patterns for three genes simultaneously, important in genetics research and breeding programs.

4. Using the Calculator

Tips: Enter the number of favorable outcomes (0-64). The calculator will compute the probability as a decimal between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: Why 64 possible outcomes?
A: Each parent can produce 8 different gametes (2³) for three genes, resulting in 64 (8×8) possible combinations.

Q2: How to count favorable outcomes?
A: Identify all squares in the 8×8 Punnett square that match your desired genotype combination.

Q3: What about dominant/recessive ratios?
A: The same formula applies - count squares showing the phenotype you're interested in.

Q4: Can this be used for more than three genes?
A: The principle scales (4 genes = 256 combinations), but Punnett squares become impractical beyond 3 genes.

Q5: What's the probability of AaBbCc offspring?
A: 8/64 or 1/8 (12.5%) chance for this specific heterozygous genotype.