5.2 variations of heredity pages 194-196. complete dominance one allele is dominant over the other...

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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. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

5.2 Variations of Heredity

Pages 194-196

Page 2: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Complete dominance

• One allele is dominant over the other• PP purple flowers• Pp purple flowers• pp white flowers

Page 3: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

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 4: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Incomplete dominance in impatiens

photo from: kids.britannica.com

Page 5: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Incomplete Dominance in Animals

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

Photo from: buzzle.com

Page 6: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Punnett Square

Image by: fhs-bio-wiki.pbworks.com

Page 7: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

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

Page 8: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Codominance in short horn cattle

home.comcast.net hobart.k12.in.us

Page 9: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Blood types

There are 3 alleles for bloodtype:

IA , IB , i

Page 10: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Blood

medterms.com

Page 11: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Alleles

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

Page 12: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

There are four types of blood

Type AType B

Type ABType O

Page 13: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

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 14: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers
Page 15: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

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 16: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Blood types

learn.genetics.utah.edu

Page 17: 5.2 Variations of Heredity Pages 194-196. Complete dominance One allele is dominant over the other PP purple flowers Pp purple flowers pp white flowers

Blood type O

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

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Blood Type AB

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