ch23 - Chapter 23 The Evolution of Populations Western...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 23 The Evolution of Populations Western Historical Context Gregor Mendel (1822-1884) o Austrian monk whose breeding experiments with peas shed light on the rules of inheritance o Mendel was a contemporary of Darwin, but his work was overlooked until the 20 th century o With hindsight, we can say that Darwin’s theory of evolution by natural selection was correct, but he didn’t know the mechanism of inheritance The Modern Synthesis (early 1940s) o A conceptual synthesis of Darwinian evolution, Mendelian inheritance, and modern population genetics Potential for rapid population growth when resources are not limiting Resource availability generally limits population size Competition for resources (“struggle for existence”) Phenotypic variability Morphology Physiology Behavior Natural Selection: survival and reproduction of the “fittest” individuals Some variability results for heritable genotypic differences Phenotype vs. Genotype Phenotype: all expressed traits of an organism Genotype: the entire genetic makeup of an individual, or a subset of an individual’s
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

ch23 - Chapter 23 The Evolution of Populations Western...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online