APchapter15notes - Chapter15notes TheChromosomalBasisof...

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Chapter 15 notes The Chromosomal Basis of  Inheritance
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Concept 15.1 In 1902 Sutton noted the parallels  between the behavior of chromosomes  and the behavior of Mendel’s factors. Chromosomal theory of inheritance genes have specific loci on  chromosomes, and the chromosomes  undergo segregation and independent  assortment
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Concept 15.1
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Concept 15.1 Morgan traced a gene to a specific  chromosome   - Morgan used  Drosophila  “fruit flies” for  his experiments - only 4 pairs of chromosomes  wild type  flies have red eyes - white eyes is a mutant phenotype
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Concept 15.1 - Morgan mated the white-eyed male to  a red-eyed female - all F 1  offspring were red-eyed - The F 2  offspring were not 3:1; instead  all females were red-eyed while half of  the males had red and half had white  eyes - eye color was linked to the fly’s sex
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Concept 15.1 Genes located on sex chromosomes are  called  sex-linked genes - Morgan’s evidence that a specific  gene is carried on the X chromosome  helped confirm the chromosomal theory  of inheritance.
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APchapter15notes - Chapter15notes TheChromosomalBasisof...

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