He needs special care because of his inherited disease.

The doctor said his illness is genetic.

Genetics is a branch of biology that studies the function of genes and the laws of inheritance.

His thoughts were as we expected.

I am surprised by this unexpected event.

This was truly an unexpected result.

When I hear that song, old memories come to mind.

He likes to take a walk in the park at dusk.

Cytogenetics is a science that studies the structure and function of chromosomes and genes.

This allele greatly affects the inheritance of color vision.