Non-mosaic Down syndrome is a genetic disorder. Most people with non-mosaic Down syndrome have three copies of chromosome 21 in all of their cells (chromosome 21 trisomy); some have an extra copy of chromosome 21 attached to a different chromosome in all of their cells (chromosome 21 translocation).
Making the world better, one answer at a time. Stanislao Cannizzaro, an Italian chemist who worked with Dmitri, inspired Dmitri Mendeleev to come up with his creative ideas. Atomic Weight also inspired Mendeleev.
Mendelâs principles of inheritance. Mendel developed 3 principles of inheritance based on his experiments with pea plants. Gregor Mendel. Our understanding of how inherited traits are passed between generations comes from principles first proposed by Gregor Mendel in 1866.