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Early ideas inherita

QuestionAnswer
HA WAM CG Hippocrates, Aristotle, William Harvey, Anton Van Leeuwenhoek, Mid 19th century, Charles Darwin, Gregor Mendel
Hippocrates -all parts of body produced seeds of each parent fused together
Aristotle -male and female semen mixed upon conception
William Harvey -believed in epigenesis ( embryo developed stages, not pre-formed)
Anton Van Leeuwenhoek -discovered living sperm -thought little man in head of sperm -women's role to incubate little man
Mid 19th century -believed both parents contributed -Blending Theory - characteristics were blended not seperated
Charles Darwin -theorized offspring had variations of parent's characteristics -unable to explain heredity
Gregor Mendel -Austrian monk, gardner, studied math and botany, experiments using pea plants, not recognized until after death
Why was Gregor Mendel Successful? ODPA -chose right organism -designed and performed experiments scientifically -analyzed data properly
Why Pea Plants? -easy to grow, easy to see characteristics, flowers had both female and male reproductive structures, easy to mate, lots of offspring in little time
what were the 7 traits and how many options were there? -seed shape, seed colour, flower colour, pod shape, pad colour, plant height, flower position, 2 options
How did he set up experiments? -make purebred plants to get rid of hidden background characteristics -studied each trait at a time -stamens cut off to prevent self pollenation, took other plant grains to pistil of another = Cross Pollenation
Purebred -descendants from ancestors that share similar traits
Mendel's First Experiment was Plant Height, cross fertilized tall and short plant,First Filial(F1) Generation all tall = 1 dominant trait
Principle of Dominance cross breeding with contrast results will only show dominant trait
Mendel's Second Experiment -hybrid of tall plants from F1 self pollenated -2nd filial (F2) generation, mostly tall but had some short -Mendelian Ratio of experiment 3:1
Created by: bioger
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