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5.2 Variations of Heredity Pages 194-196

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Page 1: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

5.2 Variations of Heredity

Pages 194-196

Page 2: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Incomplete Dominance

Occurs when neither allele dominates the other and both have an influence on the individual.

Incomplete dominance results in partial expression of both traits.

Page 3: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Incomplete dominance in impatiens

Page 4: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Incomplete Dominance in Animals

Rex rabbit (short fur)crossed with angora rabbit (long fur)

Page 5: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Punnett Square

Page 6: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Codominance

Occurs when both alleles are expressed fully to produce offspring with a third phenotype.

Page 7: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Codominance in short horn cattle

Page 8: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Blood types

There are 3 alleles for bloodtype:

IA , IB , i

Page 9: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Blood

Page 10: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Alleles

• Each allele codes for a different enzyme that places different types of sugars on the surface of a red blood cell.

Page 11: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

There are four types of blood

Type AType B

Type ABType O

Page 12: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Genotypes and Phenotypes

IA IA blood type AIB IB blood type BIA IB blood type ABIA i blood type AIB i blood type Bii blood type O

Page 13: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual
Page 14: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Antigens

Type A blood has anti-B antigens. If a person with A-type blood receives B-type blood or AB-type blood, it will clot.

Page 15: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Blood types

Page 16: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Blood type O

The universal donor because people with every blood type can receive O-type blood without a danger of it clotting.

Page 17: 5.2 Variations of Heredity Pages 194-196. Incomplete Dominance Occurs when neither allele dominates the other and both have an influence on the individual

Blood Type AB

The universal recipient because people with AB blood can receive any type of blood


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