Biology for IGCSE & O level - Inheritance (Section 3 - No. 31)

In a dihybrid cross, what is the expected phenotypic ratio if both parents are heterozygous for both traits (assuming independent assortment and complete dominance)?

9:3:3:1

3:1

1:2:1

1:1

Explanation

The 9:3:3:1 ratio is a classic outcome of a dihybrid cross with complete dominance and independent assortment.

Biology for IGCSE & O level - Inheritance (Section 3 - No. 31)

Explanation

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