Tuesday, March 11

1
Tuesday, March 11

• Do Now have out transparency master homework
• 1. Review homework
• 2. Notes 10.3 10.4
• 3. Blood Types
• HW- finish Blood Types

2
Chapter 10

• Section3- patterns of inheritance

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Intermediate Inheritance

• Intermediate inheritance- neither allele is
  dominant over the other
• The offspring is an intermediate between the two
  parents
• Example in chickens, black and white parents
  produce blues (chickens with grayish-blue
  feathers

4
Multiple Alleles

• Codominance- two alleles are equally dominant
• Example blood types
• IA is dominant over i giving blood type A
• IB is dominant over i giving blood type B
• IA and IB are co-dominant giving the blood type
  AB

5
Polygenic Inheritance

• Polygenic inheritance- two or more genes affect a
  single characteristic
• Examples height and skin color each have several
  genes that determine how a person will look

6
Importance of Environment

• Temperature affects phenotype
• Example Siamese cats have an enzyme for black
  fur that is only active at cooler temperatures
• Nutrition affects phenotype
• Example improper nutrition causes short stature