Virtual Genetics and Karyotypes

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Virtual Genetics and Karyotypes

• Experiments 17 and 18

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Patterns of Inheritance

• Autosomal dominant/ recessive trait
• X-linked dominant/ recessive trait
• Incomplete dominance

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Sex Chromosomes and X-Linked Inheritance

• The pattern of inheritance still follows Mendels
  predictions
• Genes that are found on the X chromosome.
• Hemophilia
• Color blindness
• Males are more often affected than females
  because they inherit only one X chromosome

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X-Linked Patterns of Inheritance

• Affected males produce unaffected females
• Affected males transmit to ALL daughters, but NOT
  to sons, but daughters are unaffected
• Males are affected more often than females
• Affected males always receive the trait from
  their mother

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Punnet Squares Can be Used to Predict the Outcome
of Genetic Cross
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• Incomplete Dominance
• Four OClock flowers
• Heterozygotes express an intermediate phenotype
• Flower color traits segregate and can be seen in
  the F2 generation
• Still NOT blending inheritance

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Virtual Genetics Design
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Virtual Genetics Possible Patterns of Inheritance

• Autosomal dominant/ recessive trait
• X-linked dominant/ recessive trait
• Hint males gt females
• Incomplete dominance
• Hint 3 phenotypes
• Incomplete dominance and X-linked

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The 23 Chromosome Pairs of Homo sapiens

• Autosomes chromosomes 1-22
• Sex chromosomes X and/or Y
• Autosomes carry genes for all functions
• Sex genes carry mostly genes for sex determination

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