Biology for IGCSE & O level - Inheritance (Section 2 - No. 18)
What are the possible outcomes of a cross between two heterozygous individuals for a single trait (e.g., Tt x Tt)?
25% chance of having a homozygous dominant offspring.
50% chance of having a heterozygous offspring.
25% chance of having a homozygous recessive offspring.
A 75% chance of expressing the dominant phenotype.
Explanation
The genotypic ratio is 1:2:1, resulting in a 3:1 phenotypic ratio.
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