Mendel

• Mendel experimented with pea plants and discovered 'hereditary units' -or now known as alleles- could be dominant or recessive
• Mendel's discoveries were in the 1800s
• Mendel's discoveries weren't recognised until after his death as when he was alive, scientists didn't know much about genes and DNA
• end of 1800s - chromosomes discovered
• 1900s - genes discovered to be on chromosomes
• 1950s - double helix structure discovered
• 2003 - genome project
• the human genome project is the study of the entire genetic material of an organism