Mendel and the Laws of Heredity (Part 1)

July 20, 1822 - January 6, 1884

July 20, 1822 - January 6, 1884

________

Gregor Johann Mendel

Gregor Johann Mendel

________ Born in a German speaking family in the Silesian part of the Austrian Empire and gained posthumous recognition as the Founder of the Modern Science of Genetics.

St Thomas in Czech Republic.

________

Austrian Monk at the Monastery of

Crosses of G2arden Peas (Pisum sativum)

• Famous on his experiments from 1856-1863

Charles Robert Darwin (1809-1882)

English naturalist Darwin introduced the Theory of Natural Selection.

Origin of Species by Means of Natural Selection

He expressed his findings and ideas in his famous research publication,_________________in the year 1859, after observing the living communities of Galapagos Islands.

Blood theory of heredity.

Charles Darwin thought that the traits from parents were transmitted to their offspring by BLOOD, thus came the _____________. This theory gives rise to the expressions

traits are not contained in blood but in sex cells.

Early concepts about transmission of traits are now considered inaccurate as we now know that both parents contribute hereditary traits to their offspring and that these_______________________?

Genetics

branch of biology that deals with heredity and variation of organisms.

Chromosomes

carry the hereditary information (genes)

DNA > RNA > Proteins

Arrangement of nucleotides in DNA

Homologous Chromosomes

Chromosomes (and genes) occur in pairs

Fertilization from two parents

New combinations of genes occur in sexual reproduction

Garden Peas

have several varieties that have observable, contrasting characteristics

Garden Peas

reproduce by self-pollination (they reproduce by themselves)

Scientific journal in 1866

Published these findings in its _____________ after he reported it to a local natural history society.

Hugo de Vries, Karl Correns and Erich von Tschermak

His work was not appreciated until 3 scientists rediscovered his work at around 1900

After his death

His achievement was only recognized after the turn of the century, many years

bloodline, blue blood, and blood relative.

Charles Darwin thought that the traits from parents were transmitted to their offspring by BLOOD, thus came the blood theory of heredity. This theory gives rise to the expressions