I am majoring in econometrics at university.

He is an expert in biophysics.

I am majoring in biophysics at university.

Molecular biology is a field of study that understands life phenomena at the molecular level.

Biotechnology plays a very important role in the medical field.

I am majoring in developmental biology at university.

He is an expert in sociolinguistics.

I am very interested in sociolinguistics.

He is an expert in primatology and is engaged in the study of gorilla behavior.

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