Meiosis and Sex Linked Traits

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Meiosis and Sex Linked Traits

• Section 10. 4 10.5

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• Section 10.4

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Meiosis Mendels Principles(10.4)

• Chromosome Theory of Inheritance
• Genetic linkage and crossing over

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Chromosome Theory of Inheritance

• Genes located on chromosomes
• The behavior of chromosomes during fertilization
  and meiosis accounts for the inheritance pattern
• Diploid individual? two sets of homologous
  chromosomes
• Gene Locus? alleles for the gene resides in the
  same location

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Genetic linkage and Crossing Over

• Genetic linkage? the tendency for alleles on one
  chromosome to be inherited together
• The closer the genes the greater the linkage
• Crossing Over? exchange of genetic material
  during meiosis, alleles can sort independently if
  crossing over separates them

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• Section10.5

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Sex Linked Traits (10.5)

• Sex- linked Genes? gene located on a sex
  chromosome
• Sex-Linked Disorders? conditions that arise when
  the gene for the disorder is present on the sex
  chromosome, ex colorblindness, hemophilia

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Sex- linked Genes