Introduction Flashcards
Jean Baptiste Lamarck’s Pre-Darwinian Concept
- Believed that organisms tend to progress toward higher forms
- Features and characteristics of organisms are inherited
Leopold Chretian Frederick Dagobert Cuvier’s Pre-Darwinian Concept
- Proposed that species are extinguished periodically by sudden catastrophes to be replaced by another species
3 main concepts of the Theory of Natural Selection
- Variation
- Inheritance
- Selection
Definition of ‘Variation’
Organisms vary across a multitude of dimensions of attributes
Definition of ‘Inheritance’
Some of the attributes that vary are inherited and reliably passed down to offspring over generations
Definition of ‘Selection’
Organisms with heritable attributes reproduce and have more offspring as those attributes help overcome the problem of survival and reproduction
Definition of ‘Fitness’ in evolutionary sciences perspective
The odds of an organism with a certain attribute surviving till reproduction
2 types of ‘sexual selection’
- Intra-sexual competition
- Inter-sexual competition
Explain ‘Intra-sexual competition’
Competition between members of the same sex to gain sexual access to mates directly or indirectly
Explain ‘Inter-sexual competition’
Manifests as preferential mate choices and those who do not have advantageous characteristics are less likely to be chosen as mates
Darwinism after Darwin
- Classic Darwinism
- Mendelian genetic
- Post-synthesis
What concepts are under Mendelian genetics?
- Mutation
- Genetic inheritance
- Etc.
Mendelian genetics supports Darwin’s theory of natural selection by…
Defining by which mechanism inheritance occured (via genes)
What concepts are under post-synthesis?
- Ethology
- Inclusive fitness and kin selection
- Evolutionary-developmental theories
- Multilevel selection
- Adaptive lags
Ethology indicates…
An adaptation in the form of a physical characteristic requires the organisms to enact behaviors that make use of the adaptation for organisms to benefit from it
Inclusive fitness indicates…
Inclusive fitness = classical fitness + (effect of organism’s action on the fitness of genetic relatives x genetic relativeness)