Biology 1001A Chapter 10.1: Notes
17 Oct 2016
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How are those genes and alleles riding around on chromosomes to give. Mendelian ratios? (cid:1005)(cid:1004). (cid:1005) the begi(cid:374)(cid:374)i(cid:374)gs of ge(cid:374)etics: me(cid:374)del"s garde(cid:374) peas. Until about 1900, scientists and the general public believed in the blending theory of inheritance suggested that hereditary traits blend evenly in offspring through mixing of the pa(cid:396)e(cid:374)ts" (cid:271)lood. In his work with peas, gregor mendel studied a variety of heritable characteristics (aka. characters) such as color or shape. Trait: a particular variation in a genetic or phenotypic character. Mendel established that characters are passed to offspring in the form of genes. Rather than blending evenly, many parental traits appear unchanged in offspring, whereas others disappear in one generation to reappear unchanged in the next. The inheritance patterns observed by mendel are the result of the segregation of chromosomes, on which the genes are located, to gametes in meiosis.
