YANATHIP MEUNKAEW​ NO.3 CLASS : M.4.2 Gregor Johann Mendel YANATHIP    MEUNKAEW​ NO.3    CLASS : M.4.2

Timeline (1822-1884) 1884 died January 6, in Brno, Austria 1822 born July 20 in Heizendorf, Austria 1833 is enrolled in Piarist secondary school in Leipnik, Heinzendorf 1838 at the age of sixteen begins to support himself 1839 becomes ill and is absent from school for months 1840 enrolls in the University of Olmutz and studies philosophy 1843 joins the Augustinian monastery and changes his name from Johann to Gregor 1851 Enrolls in the University of Vienna 1856 Begins experiments with genes (Pea Plant Experiment) 1884 died January 6, in Brno, Austria

Mendel’s Pea Plant Experiments Why Mendel Choose the Pea Plant? Can be grown in a small area. Produce lots of offspring . Produce pure plants when allowed to self-pollinate several generations . Can be artificially cross-pollinated.

Mendel’s Pea Plant Experiments Mendel's peas typically had 2 seed shapes: round and wrinkled. Mendel produced this experiment by breeding different types of peas together to see which traits were passed to the offspring. Breeding and tracing traits is known as hybridization.

Mendel made crosses between true-breeding, self-fertilizing plants; He followed the inheritance of distinctive traits in the offspring and kept quantitative records .

Main Theory Mendel had a theory that was comprised of three basic laws; these laws pertained to traits, characteristics, and heredity.

Mendel’s First Law “Sex cells of a plant may contain two different traits, but not both of those traits.” Mendel’s Second Law Characteristics are inherited independently from another (the basis for recessive and dominant gene composition). Mendel’s Third Law Each inherited characteristic is determined by two hereditary factors (known more recently as genes), one from each parent, which decides whether a gene is dominant or recessive.

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