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INHERITANCE PATTERNS

Learn about various inheritance patterns including complete dominance, codominance, and multiple alleles. Understand genetic screening tests like amniocentesis and CVS, and explore the concept of multiple alleles traits such as blood types. Delve into X-linked and sex-influenced traits with real-world examples.

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INHERITANCE PATTERNS

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  1. INHERITANCE PATTERNS • Complete Dominance • Codominance • Incomplete dominance • Multiple Alleles • Polygenic • Environmental Conditions

  2. X-linked traits – traits located on the X chromosome • Sex-influenced traits – the presence of male or female hormones influences the expression of certain traits. Ex. baldness

  3. GENETIC SCREENING TESTS - examination of a person’s genetic makeup • Amniocentesis – b/t 14th and 16th week • Chorionic villi sampling (CVS) – b/t 8th and 10th week

  4. Genetic marker – a short section of DNA that is known to have a close association with a particular gene nearby.

  5. MULTIPLE ALLELES TRAIT = trait controlled by genes that have more than 2 alleles • Any combo of 2 alleles produces different phenotypes Ex. Blood types 4 blood types – A, B, AB, O AB+ – universal acceptor O- - universal donor

  6. 3 alleles – IA , IB , Ii

  7. 3 alleles – IA , IB , Ii

  8. 3 alleles – IA , IB , Ii

  9. 3 alleles – IA , IB , Ii

  10. 3 alleles – IA , IB , Ii

  11. 3 alleles – IA , IB , Ii

  12. Ex. If mom has IAIi and dad has IAIB, what are the chances of having a child with type B blood?

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