GENE 320 Chapter Notes - Chapter 1: Cloning, Gene Therapy, Vitamin A
Document Summary
In the time of aristotle & hippocrates, people believed (primitive theories w/ no real evidence) Acquired characteristics could be passed down to offspring. The vital heat within male semen was allowed for the production of offspring that were of the same form. Organisms are derived from substances present in the egg that differentiate into adult structures such as organs not present in the early embryo. Con icted w/ preformation- states that sex cells contain a complete miniature adult perfect in every form called a homunculus. Matthias schleiden & theodor schwann proposed cell theory - all organisms are composed of basic units called cells. Spontaneous generation- the creation of living organisms from nonliving components - disproved by louis pasteur. Fixity of species- species have stayed the same throughout their time on earth. Carolus linnaeus - creation of the binomial system of classi cation. Chromosomes in diploid cells exist in pairs called homologous chromosomes.
