Class Notes 6: Complex Inheritance

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Class Notes 6 Complex Inheritance
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I. Incomplete Dominance

• When neither trait is dominant.
• Result is a blend of both traits.
• Ex white (rr) x
• red(RR) pink
• (Rr)

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II. Codominance

• When both traits are dominant
• Result is that both traits show
• Ex brown x white brown spotted

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III. Multiple Alleles

• When there are more than two alleles of each
  trait
• Ex Rabbit fur color has four alleles for one
  trait

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IV. Polygenic Traits

1. When more than one gene is in charge, so
   inheritance rules are very complex.
2. Ex Eye color and skin color

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V. Sex-linked trait

• When a gene for a trait is located on the X or Y
  chromosome.
• Ex Colorblindness is on the X chromosome.
• Why are males more likely to be colorblind?

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The End