Term : Gene
Origin: Anc Greek γενεά/ genea(=generation) < γεννώ/geno (=birth to)
*Pangenesis : Charles Darwin’s hypothetical mechanism for hereditary. Aaccording this theory of 1868, gemmules containing hereditary information from every part of the body throws off into the blood and finally they are collected in the reproductive cells in gonads as the units of hereditary transmission. Twenty years later in 1889, De Vries, a Dutch botanist, published his book "Intracellular Pangenesis" in which, based on a modified version of Darwin’s theory, he postulated that different characters have different hereditary carriers and that inheritance of specific traits in organisms comes in particles. He called these units pangenes, a term 20 years later to be shortened to genes by Wilhem Johannsen.