Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chapter 22: Descent with Modification: A Darwinian View of Life (Charles…
Chapter 22: Descent with Modification: A Darwinian View of Life
Charles Darwin
Development of Idea of Evolution
Went on Beagle to Galapagos Islands to accompany friend
Evolution
Populations change overtime in response to the environment
Ended up discovering difference in animals that seemed similar to each other
Wrote notes and kept it in a book over his observations
Inspirations
Lamarck
Aristotle
Linnaeus
Malthus
Chapter 24: The Origin of Species
Biological Species Concept
If two organisms reproduce with fertile offspring and its generations, then they are species
Other Ways To Determine Species
Morphological Species Concept
If two organism's body structure share similar traits, then they are species
Ecological Species Concept
If two organisms interact with another closely, then they are species
Reproductive Barriers
Reproductive Isolation
- factors that prevent reproduction
Pre-zygotic Barriers
- factors that prevent a zygote from forming
Habitat Isolation
When the location of certain organisms prevent them from mating
(i.e apple maggot flies mate in apples while blueberry maggot mates in blueberries)
Temporal Isolation
When the mating season of different organisms doesn't let them get in contact and mate
(i.e western spotted skunks mate in summer and eastern spotted skunks mate in winter)
Post-zygotic Barriers
- factors that prevent hybrids from producing good offspring
Chapter 23: The Evolution of Populations
Chromosomal Component
Structure
Locus (loci)
-specific places in the chromosome; mirrored with opposite chromosome
Allele
- alt. form of gene (i.e eye color, hair color, sickle cell)
Meiosis/ Mitosis
Meiosis
- splitting of sex cells, results in unique haploid cells
Brings variation b/c of unique chromosomes in haploid cells
Ultimately makes evolution happen (keep in mind it's overtime)
Helps pass on good genes, which makes evolution happen as a result
