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Previous lEsson
What is mutation?
How many types of mutation?
What are they?
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Today we will learn about
3.5 The effects of genetic research on humanlife
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What is genetic research?
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G enetic research is a systematic study of genes,their
functions, the traits they control and thediseases they can
cause.
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C ontributions of genetic research inmedicine
Discovery of various types of hereditydisorders.
down syndrome due to extra chromosome21 st pair of chromosome in
the body cellsKlinefilter s syndrome due to an extra X-chromosome
in a man
Turner s syndrome due to X-chromosomeless in a womenHaemophilia
due to a recessive gene carriedon a X-chromosome.
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G enetic research has enabled doctors to
determine whether the foetus will suffer froma hereditary
disorder such as down ssyndrome.
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G enetic research
Develop technology using bacteria yeast cellsas factorise for
producing the hormoneinsulin. Insulin used in the treatment of
diabetes.
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C ontribution of genetic research inagriculture
Developing new techniques for selectivebreeding.Techniques used
for selective breeding includecross breeding, cloning and
genetic
engineering.
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What is cross breeding?
C ross breeding is use of selected plants orlivestock for
crossing with one another toproduce new varieties with
desiredcharacteristic.
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O il palm
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The tenera palm has the following quality:
It produce more fruitIts kernel contain more oil
Its shell is thinner, making it easier toextract oil
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C ow
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ChickenImported andlocal kampungchicken
New breed that
grows maturedfaster
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What is cloning?
The growing of a living thing from a single cellwhich is not a
sperm or an ovum. The celltaken from a plant or an animal, contains
allthe chromosome.
example : Dolly, sheep cloned from thegenetic material of a
parent cell.
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What is genetic engineering?
G enetic engineering is a process for joiningtogether good genes
from other cells in newand more helpful ways.
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A rgument for and against geneticresearch
For genetic research Against genetic research
1. Enables a mother to know whetherher foetus is suffering from
anyheredity disorder such as down ssyndrome.
2. Enable us to identify individualsthrough DN A testing.
3. Can use method cloning to duplicatehigh quality plants and
animals.
4. Can clone highly capable people likeEinstein.
5. G enetic engineering can producebacteria which can make
usefulchemical such as hormones, insulinand interferon for the
treatment of
diseases.
1. It may cause the mother to abort herfoetus and take away a
life.
2. This method may cause criminals todestroy their victims
completely.
3. Some people are against cloningbecause it will one day lead
to thecloning of human beings.
4. Can clone highly undesirable peoplelike Hitler.
5. G enetic engineering can accidentlymake diseases-carrying
bacteria.Bacteria will kill large number of people.
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Exercise
What is mean by genetic research?
State one contribution of genetic research on
the treatment of diabetes.What is cloning?
What is genetic engineering?
