Mutations. 1. Mutation – Changes in genetic material 2. Gene mutation – changes in a single gene Chromosome mutation – change in whole chromosome 3. Point mutation – a gene mutation involving one or a few nucleotides.
Chromosome mutation – change in whole chromosome
3. Point mutation – a gene mutation involving one or a few nucleotides.
Leukemia is an uncontrolled proliferation of one kind of white blood cell (or leukocyte).
9. How are mutations harmful?
They can cause defective proteins to form which disrupt normal biological activity. They can cause genetic diseases and some types of cancer.
They cause genetic variation in a species. Proteins that are new or altered can be useful to organisms in different or changing environments. This is one factor in the evolution of a species.
Power to Predict
Power to Choose
Power to Manipulate
improving a species by allowing
only those individual organisms with desired characteristics to produce the
naturally occurring genetic variation in organisms to pass desired traits on
5. Crossing dissimilar individuals to bring together the best of both organisms.
6. Ex: Burbank combined the disease resistance of one plant with the food-producing capacity of another –Russet Burbank potato. He also hybridized the Shasta Daisy
7. Breeding of individuals with similar characteristics
8. Ex: Dog Breeding – Poodle, Golden Retriever
9. Risks of inbreeding – since most members of a breed are genetically similar, there is a chance of bringing together two recessive alleles – genetic defect. Ex: blindness, joint deformities in German shepherds and golden retrievers.
rewrite an organism’s DNA
Perform the following tasks:
Cells are opened and
the DNA is separated from
The other cell parts
DNA polymerase to start