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2-Mechanisms of Inheritance

2-Mechanisms of Inheritance - Mechanisms of Inheritance...

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Unformatted text preview: Mechanisms of Inheritance Reproducing Life Gregor Mendel • How were traits inherited? • 1865 publication 1822-1884 Pea Characteristics 1. Law of Segregation 1 unit per parent 2. Law of Independent Assortment Traits are inherited independently Homologous Chromosomes Gene • Segment of DNA Locus • Position Allele • Variation Genotype EE Ee ee Phenotype Free-hanging ( Dominant = E) Attached ( Recessive = e) Mendelian Traits Flower color: R dominant Evolutionary Synthesis 1. Mechanism for evolution (natural selection + 2. How traits were passed (genetics) What is the structure of the chromosome & how was it replicated? DNA Discovery • 1953 • Watson, Crick, Wilkins & Franklin Deoxyribonucleic acid (DNA) x-ray diffraction Nucleus Cytoplasm Chromosome DNA Base pairs CELL Location Of DNA in Eukaryotic Cell Membrane DNA Molecule • 2 chains of nucleotides • Nucleotide – Sugar – Phosphate – Nitrogen Base Double helix Structure of DNA Bases • Adenine — Thymine • Guanine — Cytosine •...
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2-Mechanisms of Inheritance - Mechanisms of Inheritance...

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