BSC 2010 Chapter 8: Chapter 8 Inheritance, Genes and Chromosomes
13 Feb 2017
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Concept 8. 1: genes are varticulate and are inherited according to mendel"s. By mid 19th century, two hypotheses had emerged to explain the result of breeding experiments: Blending inheritance: proposed that gametes contained hereditary determinants that blended when the gametes fused during fertilization; the two different determinants lost their individuality after blending and could never be separated. Particulate inheritance: each determinant had a physically distinct nature; when gametes fused in fertilization, the determinants remained intact. Mendel used the scientific method to test his hypotheses. Gregor mendel was sent to university of vienna and then returned to the monastery; mendel made crosses with thousands of plants. He felt that inheritance was due to particulate factors. His work was ignored until 1900 when biologists discovered chromosomes and made the connection between genes and chromosomes. Pea flowers normally self-fertilize, however, the male organs can be removed from a flower so that it can be manually fertilized with pollen from a different flower.
