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Chapter 14 Mendel and the Gene Idea

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Chapter 14 Mendel and the Gene Idea Chapter 14 Mendel and the Gene Idea Pedigree analysis reveals Mendelian patterns in human inheritance Chapter 14 Mendel and the ... – PowerPoint PPT presentation

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Title: Chapter 14 Mendel and the Gene Idea


1
Chapter 14Mendel and the Gene Idea
2
Chapter 14Mendel and the Gene Idea
  • Law of Segregation

3
Chapter 14Mendel and the Gene Idea
  • Law of Segregation
  • Two alleles are packaged into separate gametes.

4
Chapter 14Mendel and the Gene Idea
  • Law of Independent Assortment

5
Chapter 14Mendel and the Gene Idea
  • Law of Independent Assortment
  • Each pair of alleles segregates into gametes
    independently.

6
Chapter 14Mendel and the Gene Idea
  • Rules of probability

7
Chapter 14Mendel and the Gene Idea
  • Rules of probability
  • The probability of a compound event is equal to
    the product of the separate probabilities of the
    independent single events.

8
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple

9
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • incomplete dominance

10
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • incomplete dominance

white red
flowers flowers
11
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • incomplete dominance

pink
flowers
12
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • codominance

13
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • codominance

type A type B
blood blood
14
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • codominance

type AB
blood
15
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • codominance

16
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • multiple alleles

17
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • multiple alleles

red blond brown black
hair hair hair hair
18
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • multiple alleles

19
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • pleiotropy

20
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • pleiotropy

sickle cell anemia
21
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • pleiotropy

sickle cell anemia
crippling immunity
joint pain to malaria
22
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • epistasis

23
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • epistasis

brown pigment
white mouse
24
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • epistasis

brown pigment
brown mouse
depositing pigment
25
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

26
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

pigment 1 pigment 2 pigment 3
skin color
27
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

pigment 1 pigment 2 pigment 3
skin color
28
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

pigment 1 pigment 2 pigment 3
skin color
29
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

pigment 1 pigment 2 pigment 3
skin color
30
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple
  • polygenetic traits

31
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple.
  • environmental factors

32
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple.
  • environmental factors

fur turns white in cold weather
brown rabbit
33
Chapter 14Mendel and the Gene Idea
  • The relationship between phenotype and genotype
    is rarely simple.
  • environmental factors

fur turns white in cold weather
white rabbit
34
Chapter 14Mendel and the Gene Idea
  • Pedigree analysis reveals Mendelian patterns in
    human inheritance

35
Chapter 14Mendel and the Gene Idea
  • Pedigree analysis reveals Mendelian patterns in
    human inheritance.
  • Many human disorders follow Mendelian patterns of
    inheritance.

36
Chapter 14Mendel and the Gene Idea
  • Technology provides tools for genetic testing and
    counseling

37
Chapter 14Mendel and the Gene Idea
  • Technology provides tools for genetic testing and
    counseling
  • Family histories

38
Chapter 14Mendel and the Gene Idea
  • Technology provides tools for genetic testing and
    counseling
  • Family histories
  • Amniocentesis

39
Chapter 14Mendel and the Gene Idea
  • Technology provides tools for genetic testing and
    counseling.
  • Family histories
  • Amniocentesis
  • Chorionic villus
  • sampling.
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