DNA or deoxyribonucleic acid, discover ______ by American biochemist James Watson and British biophysicist Francis Crick.

A DNA molecule that consists two strands of twisted ladder shaped structure.

It is a complete set of the body's genome that is twisted into forty-six packets of threadlike microscopic structures.

Refers to how susceptible the organism is to being injured or altered by a traumatic incident.

It is female reproductive cell. It also called egg cell.

First menses is called ______.

How many genes does the scientist estimated?

Contains two arteries and one vein that connects the embryo to the placenta.

What do you call the process of cell division in which each pair of chromosomes in the cell separates?