Biology for IGCSE & O level - Inheritance (Section 11 - No. 35)
What is the phenotypic ratio expected from a cross between two heterozygous individuals (Aa x Aa)?
1:1
3:1
1:2:1
9:3:3:1
คำอธิบาย
The phenotypic ratio is 3:1 where 3 express the dominant trait and 1 the recessive trait