The cell nucleus holds genetic information.

He exercises every day to keep his health.

He always keeps a smile on his face.

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

This information is very important.

In physics, the study of the 'nucleus' at the center of an atom is important.

Genetics plays a crucial role in passing on the characteristics of organisms to the next generation.

His blue eyes were genetically inherited from his mother.

The number of nuclear-armed countries is increasing worldwide.

This cell is dividing very actively.