Incomplete and Codominance

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Incomplete and Codominance
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Simple Inheritance

• Mendel studied simple patterns of inheritance.
• Found that inheritance was controlled by a
  dominant allele (B) or recessive allele (b).
• However, there are many inheritance patterns that
  are more complex.
• Most traits arent simply dominant or recessive.

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Incomplete Dominance

• -When traits are inherited in an incomplete
  dominance pattern, the phenotype of the
  heterozygous is a blend of the homozygous
  dominant (BB) and the homozygous recessive (bb).
• Example BB red
• bb white
• Bb pink

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Codominance

• -Occurs when two or more dominant alleles for a
  gene are expressed.
• -Neither allele is dominant or recessive no
  blending.
• Example- in cows, R is for red coat color, W is
  for white coat color. RW roan coat color.
• RR red, WW white, RW roan