Chapter12 - Dakotah Forell Chapter 12 Evidence from...

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Dakotah Forell Chapter 12 9-20-10 Evidence from Genetics I. -If hypothesis of evolution is valid, then we should see evidence in genetics. **Study of variations and heritability in biological organisms. Background: Gregor Mendel (1822-1884) - bean and peas. -father of genetics ** Mendel genetics (mathematic experiment) Monohybrid cross = Breeding experiment involving a single trait P = parent generation; F 1--n = subsequent generations P Tall x Tall Short x Short F 1 All Tall All Short \ / F 2 All Tall (cross) F 3 ¾ Tall ¼ Short Terms and Principles 1. Dominant trait (Tall) 2. Recessive trait (Short) 3. Phenotype (Visible characters) 4. Genotype (Coded characters) 5. Particulate Theory of Inheritance (1 st big Mendellian law) – 2 particles or factors per trait -- opposes Blending theory of inheritance 6. Principle of Segregation (both can be passed on to nest generation) -- Dominant & recessive factors remain separate from generation to generation
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Monohybrid Cross Trait Tall Short P TT
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Chapter12 - Dakotah Forell Chapter 12 Evidence from...

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