Chapter 15 The Chromosomal Basis of Inheritance

Chapter 15 The Chromosomal Basis of Inheritance - Chapter...

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Chapter 15 The Chromosomal Basis of Inheritance Chromosomes Mendel’s Law of Independent Assortment and Law of Segregation explained by chromosomes separating and assorting independent in gamete production Contain genes Information for making a polypeptide/protein Loci on specific chromosomes Chromosome Theory of Inheritance Genes have specific loci on chromosomes It is the chromosomes that undergo segregation and assortment Mendel used garden pea to study inheritance Later geneticists used fruit fly Thomas Hunt Morgan Traced a gene to a specific chromosome with fruit fly Why is Drosophila melanogaster a good model for genetics? 1. 2.
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3. Eye color Mutant white eyed male X red eyed females E 3:1 phenotype But all females red eyes and 50% of males had red, 50% white eyed males Sex linked gene Eye color associated with the sex chromosome Set up a punnett square P, F1 F2 generations Linked genes Transmitted on the same chromosome Inherited together Plant height and pod shape in Mendel’s exp
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Chapter 15 The Chromosomal Basis of Inheritance - Chapter...

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