What was thomas hunt morgan mai cotribute to science

He was a biologist who had studied about the heridity that transfers through chromosomes ( genes ) . He varified the chromosomal theory.. Morgan worked with tiny fruit flies ( Drosophilia ) . Many types of heredity variations he had observed.. And later , he gave a clear picture about the gene transfer.

A) 4 amusingb)alpha particle is a helium nucleus. it contains 2 protons and 2 neutrons.c)alpha particle has charge of +2.