BIO152H5 Chapter 12: BIO152 - CHP 14
Document Summary
Chapter 14 - mendel and the gene idea. 14. 1 mendel used the scientific approach to identify two laws of inheritance. Mendel studied seven characters/heritable features that occurred in alternate forms called traits. He used true-breeding varieties of pea plants (self fertilizing parents always produce offspring with the parental form of the character) Mendel performed hybridizations - he mated by cross-pollinating contrasting true-breeding varieties and then allowed the next generation to self pollinate. F1 generation - first filial; offspring of the first cross. F2 generation - second filial; offspring of the cross-pollinated f1 generation. Mendel found that the f1 offspring did not show blending of the parental traits. Instead, only one of the parental traits of the character was found in the hybrid offspring. In the f2 generation, the missing parental trait appeared in a 3:1 ratio - three offspring with the dominant trait and one with the recessive trait.
