Discovered that genetic variation is caused by chromosomes crossing over during meiosis (when egg/sperm new cells are made)

Discovered that genes can move within chromosomes (transposition)

Helped discover DNA's structure

Discovered that DNA can exist in two forms (DNA and RNA)

Made nursing a respected, highly-trained profession

Used statistics to analyze health outcomes. Increased hospital sanitation, which increased human life expectancy by 20 years.

Founded the study of genetics & heredity.

Identified dominant & recessive traits & discovered that offspring get traits from parents in a predictable way

Found of the global environmental movement

Conservationist who wrote the Silent Spring book, leading to bans on harmful chemicals in order to preserve nature

Biochemist who helped discover the order of nucleotides in DNA & RNA. Helped to create the amino acid codon chart.

Determined that the sequence of amino acids determines how proteins are made (protein synthesis)

Discovered that a person's sex is determined by X and & chromosomes

Invented the first microscope & created the study of microbiology

The first to research treating tumors with radiation. Co-discovered the elements of radium & polonium.

First woman doctor in America.

Founded the first medical school for women