01:119:116 Lecture Notes - Lecture 13: Genetic Linkage, Barr Body, Zw Sex-Determination System

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Concept 15. 1 morgan showed that mendelian inheritance has a physical basis in the behavior of chromosomes. Concept 15. 3 linked genes tend to be inherited together because they are located near each other on the same chromosome. Mendel"s laws can be summarized using dihybrid crosses: 1st law: f1 showed uniform round and yellow characters, with 1 dominant and. Allele pairs separate during gamete formation, and randomly unite at fertilization. Gametes randomly join with other gametes from f1 to form f2. Fig 15. 2 the chromosomal basis of mendel"s laws: the chromosomal theory of inheritance states: Mendelian genes have specific loci (positions) on chromosomes. Chromosomes undergo segregation (law 1) and independent assortment (law 2: the two alleles for each gene separate during meiosis and the alleles on non- sister recombinants assort independently into the gametes. 15. 1 morgan showed that mendelian inheritance has a physical basis in the behavior of chromosomes.

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