what is a recessive trait

Quick Scoop

A recessive trait is a characteristic that shows up only when a person inherits two recessive alleles for that gene, one from each parent. If a dominant allele is present, it usually masks the recessive trait.

In simple terms

• Trait = a visible or measurable characteristic, like eye color or blood cell shape.

• Allele = a version of a gene.

• Recessive = the trait appears only when both copies are recessive.

• Dominant = one copy is enough to show that trait, and it can hide the recessive one.

Example

If a gene has one dominant allele and one recessive allele, the dominant trait is usually expressed. The recessive trait appears only when both alleles are recessive, which is called homozygous recessive.

Tiny example

Think of it like a light switch with two controls: a recessive trait is like a light that turns on only if both switches are set a certain way. If either switch is dominant, the recessive trait stays hidden.

If you want, I can also explain dominant vs. recessive traits with a very short Punnett square example.