{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Biology lecture14f

Biology lecture14f - Review Evolution occurs by Acquired...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Review Evolution occurs by: Acquired characteristics (Lamarck) Natural selection (Darwin & Wallace) Mutation (DeVries ) Today’s view Mutation provides the variability – new alleles Sexual and genetic recombination (cross over) provide variability by reshuffling existing alleles Natural selection acts on the alleles present in the population causing shifts in their frequency of occurrence
Background image of page 1

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

View Full Document Right Arrow Icon
Review (cont) Acquired characteristics cannot be passed on via DNA to the next generation in sexual reproducing organisms
Background image of page 2
Population Genetics This is the study of change in the gene frequency in the population through time . Gene pool = the number of alleles present in the population Gene frequency and genotype frequency remain constant in the population if there is:
Background image of page 3

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

View Full Document Right Arrow Icon
Population Genetics cont. 1. Random breeding 2. No differential migration 3. Large population 4. No mutations 5. No natural selection Given these conditions, the distribution of a pair of alleles can be described by the following equation.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}