1. 13.1 - Changing the Living World

2. Concept Map Selective Breeding Section 13-1 Go to Section: consists of
Inbreeding
Hybridization
which crosses
which crosses
Similar organisms
Dissimilar organisms
for example
for example
Organism breed A
Organism breed B
which
which
Retains desired characteristics
Combines desired characteristics
Go to Section:

3. Selective Breeding
Selective breeding has been used thousands of years by humans
Dogs have been bred to hunt, be better retrievers or make them hypo-allergenic
Humans select desired traits to pass on to the next generations
Almost all domestic animals and most crops have been produced by selective breeding

4. Hybridization
Crossing dissimilar individuals to bring together the best of both traits
Creates hybrids
Can help create plants that are naturally resistant to pests and disease
Liger
Leopon
Cama

5. Inbreeding
Continued breeding of individuals with similar characteristics
Ensures that each breed stays unique
Maintains desired traits
Happens with dogs quite often
Does have risks:
Can increase genetic defects
Many breeds of dogs have joint problems and other issues because of this

6. Increasing Variation
Breeders sometimes increase genetic variation in a population by inducing mutations
Mutations are inheritable
New kinds of bacteria
Produce bacteria that breakdown oil
New kinds of plants
Plants can be produced that are polyploid
Polyploid = extra set of chromosomes