1. What Is Dihybrid Cross Probability?

The dihybrid cross probability calculates the chance of offspring inheriting specific trait combinations when considering two different genes. For guinea pigs, this might include traits like coat color and texture.

2. How The Calculator Works

The calculator uses the dihybrid cross probability formula:

Where:

• \( P \) — Probability of specific phenotype combination
• \( F \) — Number of favorable outcomes in Punnett square (0-16)
• 16 — Total possible combinations in dihybrid cross

Explanation: In a dihybrid cross (AaBb × AaBb), there are 16 possible genotype combinations in the offspring.

3. Importance in Genetics

Details: Understanding dihybrid crosses helps predict inheritance patterns, determine genotype-phenotype relationships, and calculate expected phenotypic ratios.

4. Using The Calculator

Tips: Enter the number of favorable outcomes (from Punnett square analysis) between 0-16. The calculator will output the probability as a fraction and percentage.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 16?
A: A dihybrid cross between two heterozygotes (AaBb × AaBb) produces 16 possible genotype combinations in the offspring.

Q2: What's the difference between monohybrid and dihybrid?
A: Monohybrid crosses examine one trait (4 possible combinations), while dihybrid examine two traits simultaneously (16 combinations).

Q3: How do I determine favorable outcomes?
A: Create a 4×4 Punnett square and count squares matching your desired phenotype combination.

Q4: What if I have more than two traits?
A: For each additional gene, multiply the denominator by 4 (trihybrid = 64 combinations, etc.).

Q5: Does this work for linked genes?
A: No, this assumes genes assort independently (not linked). Linked genes require different calculations.