day 8 feb 7 chapter 5 scrid

8/3/2019 Day 8 Feb 7 Chapter 5 Scrid

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Day 8 - Chapter 5

February 7th

We do between five and ten clicker

questions per class meeting. If youmiss a day or two, youll be fine.


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Causes and effects of mutation

Alteration of the sequence of bases inDNA

can lead to changes in the structure andfunction of the proteins produced

can have a range of effects


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Why is it dangerous around thecore of a nuclear power plant?

Chemical-induced mutations


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Genetic Engineering

Adding, deleting, or transplanting genesfrom one organism to another, to alter theorganisms in useful ways

5.10 What is biotechnology?


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Biotech advances in human health fall intothree categories:

(1) producing medicines to treat diseases

(2) curing diseases

(3) preventing diseases from occurring inthe first place.


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Almost everyone in the U.S. consumesgenetically modified foods regularly

without knowing it.

What foods are responsible for this?


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Insect Resistance


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How can genetically modified

plants lead to reduced pesticideuse by farmers?

1961, the toxic Bt crystals were included in pesticides

1995, however, recombinant DNA technology let to DNA that included Bt


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Herbicide Resistance


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Faster Growth and Bigger Bodies


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5.16 Fears and risks: the safety ofgenetically modified foods


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Fear #1. Organisms that we want to kill may

become invincible. Fear #2. Organisms that we dont want to kill may

be killed inadvertently.

Fear #3. Genetically modified crops are not tested

or regulated adequately.


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(1) Mapping Genetic Landscapes:The Human Genome Project

the three billion nucleotide base pairs in the human genome

and to identify all the genes present in it, 2000


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(2) Building Earths Family Tree

phylogenetic trees

were built based on

similarities in

organisms physical

structures and

embryological

development, DNA

sequences


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When we sayhumans andchimps are genetically 96%

identical, what do we mean?


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5.19 The promise and

perils of cloning

From organs to individuals


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1997 Ian

Wilmut,

a British

scientist,

first

cloned a

sheep

surprisingly

simple in

concept


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Are there any medical

justifications for cloning?

Cloned animals might produce human medicines or organs


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Is it possible toclone adinosaur? How

could it bedone?


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A chicken dinosaur? Scientists

discover what the bird mighthave look liked in prehistoric

times


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Continuity and varietyLectures by Mark Manteuffel, St. Louis Community College; Clicker Questions by Kristen Curran, University of Wisconsin-Whitewater

Chapter 6: Chromosomes and Cell Division


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Bladder Cancer cells


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6.1 Immortal cells can spell

trouble: cell division insickness and health.

Once you are fully grown, do you have just one set of cells

that live as long as you do?


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Telomeres

The telomere is like aprotective cap at theend of the DNA.

Every time a celldivides, the telomeregets a bit shorter.

(Like a cars odometer)


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At birth, the

telomeres inmost human cells

are long enough

to support about50 cell divisions

Is there a Fountain of Youth?


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Cancer

These are cells

that rebuild

theirtelomeres

after each cell

division,

restoring theprotective cap,

never stop

dividing


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Cancer cells are those

whichhave forgottenhow to die.Harold Pinter

day 8 feb 7 chapter 5 scrid

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