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Chapter 5 Heredity

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Title: Chapter 5 Heredity Author: jfrink Last modified by: jfrink Created Date: 1/21/2009 3:22:20 PM Document presentation format: On-screen Show Company – PowerPoint PPT presentation

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Title: Chapter 5 Heredity


1
Chapter 5 Heredity
  • Pages 125-143

2
Genetics terminology
  • Traits things that you inherit from your
    parents
  • Heredity the passing of traits from parents to
    offspring
  • Genetics- the study of how the traits are
    inherited
  • Probability- the chance that something will take
    place (odds)

3
  • The code for traits is carried on chromosomes

4
  • This code is called the genotype.
  • The result of the code is called the phenotype
  • Tongue Rolling example

5
  • Genotype can be
  • Heterozygous
  • Homozygous

6
Vocab we all need to know
  • Dominant Trait
  • Recessive Trait-
  • Heterozygous-
  • Homozygous-
  • Genotype-
  • Phenotype

7
Pompe Disease
8
It is a recessive disease.
9
The Punnett Square
  • 1. Traits
  • 2. Parents

10
  • Punnett Square

11
  • Genotypes and
  • Phenotypes and

12
Mice and Fur Problem
13
Gregor Mendel The father of genetics
14
  • Worked with pea plants (30,000 total)
  • Found out that some traits were dominant and some
    recessive

15
Mendels Laws of Heredity
  • 1. Traits are controlled by alleles on
    chromosomes.
  • 2. Alleles can be dominant or recessive.
  • 3. During meiosis the chromosomes that carry the
    two forms of the allele go into separate sex
    cells (gametes).
  • Punnett Square

16
Fruit Fly Lab
17
Genetics News
18
Punnett Square Practice
  • 1a. BB x bb



19
Problem 1b.
  • Bb x Bb



20
Problem 2a Yy x Yy


21
Problem 2b Yy x yy


22
Conclusion.
  • According to my to hypothesis our prediction of
    male to female should have 11. Our data was
    close, for example

23
Incomplete Dominance
  • When you have two alleles and both are dominant.

24
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25
Sex Linked Traits
  • Traits that associated with being male or female

26
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27
Hemophilia
28
How to do a punnett square for sex-linked traits.
  • In humans colorblindness is a sex-linked
    recessive trait. Show the possible children of a
    female carrier and a normal male.

29


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30
ATB-In mice having fur is a dominant trait, what
can you say about the genotype of this creature?
31
Fly lab 2
32
Punnett Square Problems
33
Lemming Lab
  • http//www2.edc.org/weblabs/Punnett/punnettsquares
    .html

34
Problem 2
35
Problem 3 Fly Packet Dihybrid cross




36
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37
  • Fly Lab 3 Dihybrid Cross
  • Predictions for Phenotypes
  • Orange Round 56.25
  • Orange Bar 18.75
  • Black and Round 18.75
  • Black and Bar 6.25

38
Lab
  • Four different colors of dice
  • Female
  • Blue (body color)
  • Yellow (eye shape)
  • Male
  • White (body color)
  • Black (eye shape)

39
Human Sex Determination
  • Human Chromosomes
  • Hemophilia a sex linked disease

40
Fly packet conclusions due Wednesday.
  • For each give a purpose statement saying what was
    the lab about.
  • Type your conclusion

41
  • Colorblindness is a sex-linked disease, show the
    offspring of a female carrier and a male with the
    disease.
  • color vision test



42
Incomplete Dominance
  • In some flowers white and red flowers have
    incomplete dominance. What types of offspring
    could a red and white flower have?



43
Polygenic Inheritance
  • When many genes contribute to a trait.
  • It produces a wide variety of results in the
    phenotype.
  • Hair color, eye color, height, weight,

44
Blood Type
  • 3 genes determine blood type,A, B, O
  • You only get 2 at a time
  • A and B are co-dominant
  • O recessive
  • blood type

45
Portfolios Due Tuesday
  • 50-50 chances lab
  • Coin flip lab
  • Lemming lab
  • Punnett square ws
  • Punnett square quiz
  • Biologica (dragon)
  • Punnett sq. review
  • crossword
  • Pea pod lab
  • Polygenic lab (height)
  • Green pepper lab
  • Fly packet
  • Inherited traits (face)
  • Fly conclusions
  • Chapter rev
  • NTWS

46
Make your own color blindness test
47
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48
Blood Type
  • Multiple alleles
  • Co-dominance
  • Blood Type Gene Possiblities

49
Chart of Blood Types
Blood Type Antigens on the blood cell Antibodies in blood
A A B
B B A
AB Both AB None
O None AB
50
  • Universal Donor can give blood to anyone
  • Type O
  • Universal Recipient can get blood from anynone
  • Type AB

51
ATB
  • Could a man who is type AB blood have a child who
    is type O?
  • Could a man who is type A blood have a child who
    is type O?

52




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53
Vocab List for the Quest
  • Heredity
  • Alleles
  • Genetics
  • Dominant
  • Recessive
  • Genotype
  • Phenotype
  • Homozygous
  • Heterozygous
  • Co-Dominance(incomplete Dominance)
  • Polygenic Inheritance
  • Sex-linked traits
  • Pedigree
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