1. Selective Breeding and Genetic Engineering

2. DNA Technology

3. Genetic engineering
the field of science that deals with making changes in an organism’s DNA
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4. the process of separating DNA from the rest of the cell
DNA extraction
the process of separating DNA from the rest of the cell
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5. substances used to “cut” DNA
Restriction enzymes
substances used to “cut” DNA
They are very specific and cut DNA only in specified places due to a nucleotide sequence.

6. Restriction enzymes
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7. Gel electrophoresis
procedure where DNA fragments are placed in a special gel and an electric current is run through it. The current picks up the pieces and carries them through the gel. Bands are then compared to a known sample.

8. Gel electrophoresis
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9. CODIS is the genetic “bank” of DNA samples from crime scenes.
Gel electrophoresis
This is used to compare samples from crime scenes to suspects(looking for a specific match), or a child to a possible family or father(looking for similarities in DNA).
CODIS is the genetic “bank” of DNA samples from crime scenes.
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12. DNA fingerprinting
an analysis of sections of DNA that are used to identify individuals….such as criminals, missing children, MIA soldiers, crime victims, etc. Each person has unique DNA that can be used for identification.

13. Suspect 3 has some explaining to do…
Hemophilia- replaces the defective allele on the X chromosome to correct the instructions for blood clotting.

14. Trait Manipulation

15. Ways to get desired traits
Selective Breeding
Inbreeding
hybridization
Genetic engineering
Cloning

16. Selective Breeding
allowing only those animals or plants with desired traits to reproduce.

17. Selective Breeding This is how we have developed
many varieties of corn, wheat,
rice, cows, horses,
dogs, etc. These are
referred to as
domesticated
varieties.
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18. Selective breeding has been practiced for thousands of years.
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19. Selective Breeding
It involves humans choosing two individuals to mate to produce offspring with certain desirable characteristics, such as:
leaner meat on an animal
wheat seeds that remain attached
to the plant for longer
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20. Selective Breeding
Many plants and animals for domestic and agricultural purposes have been bred in this way to produce new varieties.

21. Dogs are a great example

22. Examples
Cattle and sheep have been specifically bred for such things as leaner meat, more milk, creamier milk, better quality wool and increased resistance to disease.
Pigs, due to selective breeding are less aggressive, have smaller tusks and more meat compared to their genetically similar ancestors.
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23. Examples
Horses have been selectively bred from wild horses over centuries resulting in many varieties including draft horses.
breeds such as the Shire, Clydesdale, Belgian and Suffolk which are used for specific
farming purposes, but all
involve greater strength,
size and ability to pull
wagons, ploughs and drays.
Race horses also originated
from wild horses and have
been bred for greater speed.
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24. Forms of selective breeding
Inbreeding- involves crossing 2 individuals that have similar desired traits.
The offspring will probably have the same traits.
Increases the chances of the recessive alleles being inherited
Leads to genetic disorders

25. Forms of selective breeding
Hybridization- crossing 2 genetically different individuals (hybrid-different) - have best traits from both parents

26. Hybridization
the crossing of dissimilar organisms to bring together the best of both organisms.
Many crops and domesticated animals are hybrids

27. the combination of DNA from different sources.
Recombinant DNA
the combination of DNA from different sources.
(For example: Human gene for human growth hormone is inserted into bacteria and then used to produce growth hormone used to treat growth disorders).

28. Recombinant DNA
This is the same procedure used to produce insulin for diabetics, or clotting factor for hemophiliacs: they just insert a different gene into the bacteria.

30. Genetic Engineering

31. term used to describe genetically modified foods
“GM”
term used to describe genetically modified foods

32. “GM”

34. Cloning
refers to transferring the genetic material of one cell into another cell
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35. Cloning
this can result in either a group of identical cells or a new individual, in which case it is called reproductive cloning.

36. Dolly, a sheep produced in 1996, was the first cloned mammal.
Cloning
Dolly, a sheep produced in 1996, was the first cloned mammal.
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38. Cloning
Cloning is also used in agriculture with plants. Every banana you’ve ever eaten was a clone.
Image Source: io9.com

39. Make MIMI the Mouse

40. Gene Therapy
a process in which an absent or faulty gene is replaced with a normal working gene. This has been successfully done in some cases in humans.
Image Source: io9.com

41. Gene Therapy
Using genetic engineering to correct some genetic disorders in humans.
Involves inserting copies of a gene directly into a person’s cells.
Example: Hemophilia- replaces the defective allele on the X chromosome to correct the instructions for blood clotting.

42. Gene Therapy

43. Vocabulary
Selective Breeding: The intentional breeding of organisms with desirable traits in an attempt to produce offspring with similar desirable characteristics or with improved traits.
Species: A group of organisms having common characteristics that is capable of mating with one another.
Variation: Differences in individual living things from each other.
gene: A segment of DNA that codes for a particular protein.
gene pool: All the genes of all the members in a population.

44. selective pressure: Any environmental factor that favors one trait over another.
mutation: A random change in a gene or a group of genes.
genetic isolation: What occurs when two groups of one species are prevented from breeding with each other.
inherited trait: An inherited characteristic—such as hair and eye color or muscle and bone structure—that has been passed on from a previous generation.
acquired trait: An acquired characteristic—such as the ability to ride a bike or do karate—that is attained throughout life. Acquired traits are not passed on genetically.