Why are dominant traits expressed more frequently?

Dominant traits appear more frequently because they are expressed even when only one copy of the allele is present.

Key Idea

Term	Meaning
Dominant Allele	Expressed in both homozygous (TT) and heterozygous (Tt)
Recessive Allele	Expressed only in homozygous (tt)

Genetic Presence

Genotype	Expression
TT	Dominant trait
Tt	Dominant trait
tt	Recessive trait

Why More Frequent

Reason	Explanation
Wider Expression	Shows in both TT and Tt
Masking Effect	Hides recessive allele
Higher Probability	More combinations show dominant phenotype

Stepwise Understanding

1. Dominant allele needs only one copy to show

2. It appears in both TT and Tt individuals

3. Recessive needs two copies (tt)

4. So dominant phenotype appears in more individuals

Important Concept

Phenotype frequency depends on expression, not just presence of allele.

Real Insight

Even if recessive allele is present in population, it may not be visible often because dominant allele keeps masking it.

So dominant traits look more common because they express in more genetic combinations.