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INHERITANCE PATTERNS

INHERITANCE PATTERNS. Complete Dominance Codominance Incomplete dominance Multiple Alleles Polygenic Environmental Conditions. X-linked traits – traits located on the X chromosome

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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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