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INCOMPLETE DOMINANCE When neither is dominant and they mix.

Jan 14, 2016

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Flora Hunter
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Page 1: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 2: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 3: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 4: INCOMPLETE DOMINANCE When neither is dominant and they mix.

INCOMPLETE DOMINANCE

When neither is dominant and they mix.

Page 5: INCOMPLETE DOMINANCE When neither is dominant and they mix.

INCOMPLETE DOMINANCE

RR= red WW= white

RW= pink

Page 6: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What happens when you cross a red plant with a white plant?

XWhat are the genotypes?

RR WWXDo the cross!

What are the genotypic and phenotypic rations?

Page 7: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What happens when you cross a pink plant with a pink plant?

RW RWXDo the cross!

What are the genotypic and phenotypic ratios?

Page 8: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 9: INCOMPLETE DOMINANCE When neither is dominant and they mix.

CO-DOMINANCE

When both are dominant and they both show.

Page 10: INCOMPLETE DOMINANCE When neither is dominant and they mix.

RED X WHITE

OFFSPRING?

RR = Red WW = white

Page 11: INCOMPLETE DOMINANCE When neither is dominant and they mix.

RW = Red AND White

Page 12: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Roan Coat Cattle

R = brownR’ = white RR’ = brown + white

Page 13: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Sickle Cell Anemia

R = normal R’ = sickle shape

Page 14: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 15: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Blood Type

•A•B•AB•O

Page 16: INCOMPLETE DOMINANCE When neither is dominant and they mix.

MULTIPLE ALLELES

GENES AVAILABLE FOR BLOOD TYPE

• A gene• B gene• O is recessive• A and B are

co-dominant

Page 17: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Genes Available:ABo

A AA o

BBBo

AB

oo

Page 18: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Cross a heterozygous A by a heterozygous B individual.

Ao xBoA o

Bo

AB BoAo oo

25 % AB

25 % A25 % B25 % O

Page 19: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 20: INCOMPLETE DOMINANCE When neither is dominant and they mix.

SEX-LINKED TRAITS

Genes that are only on the X chromosome.

Page 21: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 22: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 23: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Colorblindness is sex-linked.

Page 24: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 25: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 26: INCOMPLETE DOMINANCE When neither is dominant and they mix.
Page 27: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Gene is located ONLY on the X chromosome.

XN = normalXn = disorder

XN Xn Normal carrier female

Xn Xn

XN Y

Xn Y

Diseased femaleNormal MaleDiseased Male

Normal femaleXN XN

Page 28: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Cross a colorblind male by a carrier female.

Page 29: INCOMPLETE DOMINANCE When neither is dominant and they mix.

Cross a normal male by a carrier female.

Page 30: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What is the difference between a genetic disorder and an infectious disease?

Genetic Disorders• Colorblindness• Hemophilia• Down’s Syndrome• Sickle Cell Anemia

Infectious Diseases•Food poisoning•HIV•SARS•Athlete's Foot•Malaria•Lyme Disease

Page 31: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What can you do about Genetic Disorders?

Inherited, not too much.Treatment vs. PreventionLorenzo?

Methemoglobinemia

Page 32: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What can you do about Infectious Diseases?

Prevention: Vaccines

Page 33: INCOMPLETE DOMINANCE When neither is dominant and they mix.

What can you do about Infectious Diseases?

Treatment: Antibiotics for bacterial infections

What about Viruses?

Antibiotics don’t work on viruses.