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