Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out
Your Federal Quarterly Tax Payments are due April 15th Get Help Now >>

Genetics

VIEWS: 8 PAGES: 83

									Mendel Genetics
  Chapter 14
Genetics
Heredity
Historically
Problem
Variation
Vocabulary
Vocabulary
Vocabulary
Vocabulary
Vocabulary
Vocabulary
Vocabulary
Vocabulary
Gregor Mendel
Why the pea??
Mendel
Mendel’s experiments
Mendel’s experiment
Mendel’s experiment
Mendel’s experiment
Mendel’s experiment
Mendel’s experiments
Mendel’s experiment
Mendel’s model
Mendel’s model
Mendel’s model
Mendel’s first law of heredity
Mendel’s experiment
Mendel’s second law of heredity
Mendel
Incomplete dominance
Codominance
Codominance
Tay Sachs
Multiple alleles
ABO
ABO
Rh blood group
ABO
Pleiotropic
Pleiotropic

   Inherited diseases that one gene
   produces many symptoms
   Sickle cell anemia
     Anemia
     Joint pain/swelling
     Heart failure
     Splenomegaly
     Renal failure
Sickle cell
Pleiotropic
Epistasis
Epistasis
Epistasis
Epistasis
Epistasis
Epistasis
Fig. 14-12

                                                  
                                     BbCc             BbCc

                         Sperm
                         1/           1/              1/           1/
                              4 BC         4 bC            4 Bc         4 bc
             Eggs
             1/
                  4 BC
                         BBCC          BbCC            BBCc         BbCc
             1/
                  4 bC
                          BbCC         bbCC            BbCc             bbCc
             1/
                  4 Bc
                          BBCc         BbCc            BBcc             Bbcc
             1/
                  4 bc
                             BbCc      bbCc            Bbcc             bbcc


                         9             : 3                   : 4
Polygenes
Continuous variation
Continuous variation
Continuous variation
Environmental effects
Environmental effects
Fig. 14-14
Pedigree




    Male     Affected    Mating
             Male
                        Offspring, in
    Female   Affected   birth order
             Female     (first-born on left)
Pedigree
Human genetics does follows
Mendelian principles
Recessive disorders
 Fig. 14-16


                  Parents
        Normal            Normal
          Aa                Aa

       Sperm
              A              a
Eggs
                             Aa
           AA
  A                       Normal
          Normal          (carrier)

             Aa
          Normal            aa
  a                       Albino
          (carrier)
Dominant disorders
Dominant disorders
Genetic counseling
Amniocentesis
Amniocentesis
Fig. 14-18a

                 Amniotic fluid
                 withdrawn

              Fetus                      Centrifugation



              Placenta
                      Uterus    Cervix

                               Fluid
                                                    Bio-
                               Fetal     Several chemical
                               cells     hours     tests

                                             Several
                                             weeks




                                         Several
                                         weeks Karyotyping

              (a) Amniocentesis
Chorionic villi sampling
Genetic counseling

								
To top