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Mendelian Inheritance has its physical basis in the behavior of ____________.
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Chromosomes
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______ are located on chromosomes
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Genes
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The behavior of chromosomes during meiosis accounts for the ____________ and ________________
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The law of segregtion and independent assortment.
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The chromosome theory of inheritance states that:
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Mendelian genes have specific loci on the chromosomes and it is the chromosomes that undergo segregation and independent assortment.
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Law of segregation
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Two alleles for each gene separate during gamete formation
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Law of Independent Assortment
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Alleles of genes on nonhomologous chromosomes assort independently during gamete formation
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_____________ experiments wit fruit flies provided evidence that genes are on chromosomes
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Thomas Hunt Morgan
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Why fruite flies for Morgan's genetic studies ?
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-They breed at a high rate
-A generation can be bred every two weeks -They have only four pairs of chromosomes |
Normal phenotypes in the fly populations are called _______ types, while alternative types are called_______types.
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Wild types; mutant types
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When Morgan mated males flies with white eyes and female flies with red eyes, the F2 generation had _______flies with _____eyes.
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Male; white
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The mutant white-eye allele was determined to be located on the _______ chromosome.
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X
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Morgan's findings supported the _________________
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Chromosome theory of inheritance
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Review the cross |
Review the cross
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Linked genes are ____________ because they are located near each other on the same chromosome
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Inherited together
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What are linked genes ?
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Genes located on the same chromosome that tend to be inherited together
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