BIOLOGY 2C03 Chapter Notes - Chapter 3&6: Gamete, Zygosity, Consanguinity
6 Feb 2013
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3. 1 gregor mendel discored the basic principles of heredity. He used the pea plant as an experimental subject. Compelting an entire geeration in a single growing season. Pea plants produce many offspring (seeds) which allowed mendel to detect ratios in the traits he observed in the progeny. He focused on traits that exist in two easily differentiated forms. He was successful because he adopted an experimental approach and interpreted his results using mathematics. Gene is an inherited factor that determines a characteristic. Genes come in different versions called alleles. Alleles for a particular gene are found at the locus for that gene. For some characters, differences between phenotypes are determined largely by differences in genotype: in other words, the genetic limits for that phenotype are narrow. For other characters, environmental differences are more important; in this case, the limits imposed by the genotype are broad. 3. 2 monohybrid crosses reveal the principle of segregation and the concept of dominance.
