Chapter 12: Genetic Engineering

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11 Δεκ 2012 (πριν από 4 χρόνια και 8 μήνες)

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Chapter 12: Genetic Engineering

Section 3: The New Human Genetics

The New Human Genetics



The rapid development of ______________________________________ has
produced a number of other developments

o

___________________________________________________

o

Decodin
g the entire human
________________________



All the genes possessed by _______________________

o

Apply molecular biology to _____________________________________
and the _________________________________________

Analyzing Human DNA



Researchers have already d
eveloped tests for genetic disorders



Researchers have also begun to look for genes that might predispose individuals
to other medical problems, such as __________________________________,
______________________, and _____________________

o

If tests that iden
tify individuals at risk can be developed, early medical
attention would be able to prolong many lives

DNA Fingerprinting



There is a large amount of “_____________________”


DNA that does not
code for protein


in the human genome

o

Junk DNA is made up of r
epeated sequences that are called
____________________

o

Although individuals may have identical genes, there may be different
numbers of repeats between these genes

o

The more repeats, the longer the junk DNA between genes



Restriction enzymes are used to cut
DNA into fragments



The DNA fragments are carefully _____________________________________

o

The fragments are separated according to their _______________ by the
process of _________________________________

o

The DNA fragments that contain ___________________ a
re detected by
using _________________________________

o

The probes are radioactively labeled pieces of nucleic acids whose bases
are complementary to those of the repeats

o

The probes match up with the repeats and stick to them

o

This produces a pattern of radi
oactive bands


the
_______________________________________

Genetic Engineering of Humans



Because humans, too, are animals there is no technical barrier to the insertion of
foreign genes into human cells



The production of transgenic animals


inserting DNA

into fertilized eggs and
then transplanting the eggs back into the female reproductive tract


serves as a
__________________________________________________________________



It is safe to predict that attempts to use genetic engineering to correct human
g
enetic disorders will continue

Ethical Issues



There are problems, risks, and doubts that have persuaded many scientists that
the time is not yet right to carry out these procedures on human beings



What will be the consequences if we develop the ability to
“_______________”
ourselves by making identical genetic copies of our own cells?



As our power over nature increases, our society shall have to learn to use wisely
the tools that science has given us