Evolution: Artificial Selection

and animals using the methods of breeding.
Success Criteria
Define hybrid,

randomness to mate, this can cause a decrease in frequency

Random
Mating

Non- Random
Mating

-Only certain individual organisms can mate
gene pool is small due to these organisms producing more offspring with only their genes
evolutionary effects
-less alleles in a population gene pool
-less chance for evolutionary change
-more chance of extinction

produce offspring
increases the heterozygous alleles
two

Inbreeding
is the crossing of two closely related parents (genetically the same), or close relatives, who share very similar alleles.
increases the amount of homozygous alleles.
One species involved
Alleles of offspring are very similar to parents
High probability of genetic mutations

Outbreeding
is the crossing of two parents that are not related and have very different alleles.
increases the amount of heterozygous alleles.
One species involved
Alleles of offspring are very different to parents
Low probability of genetic mutations

interest.
2. Breed the choices together
3. Choose offspring with ideal

they have no seeds. All bananas are CLONES! Low genetic

In contrast to natural selection artificial selection is intentional breeding or organisms for certain favorable traits, or combination of traits.

Sinapis arvensis


HOW?

In contrast to natural selection this is the
intentional breeding or organisms for certain favorable traits, or ombination of traits.

Broccoli: Flower development is suppressed

Cauliflower: flowers are sterile

Cabbage: selection for the terminal bud (head only forms)

Kale: selection is for leaves only

Undomesticated
banana-lots of seeds compared
to artificially
selected with little to no seeds

artificial selection

twice the muscle tissue. Calves are so big that Caesarian

an improvement that the cow would be ‘selected’ for if

plants and explain how they have been bred to increase

Cats

11.2.5.1 Explore ways to improve agricultural plants and animals using

selection
Criteria
√ Name the trait that was selected.

You are investigating inbreeding and hybrids as method of artificial selection, not genetic engineering or Genetically Modified Organisms (GMO)