Inheritance

Cards (19)

  • Genetic diversity
    The number of different alleles of genes in a population.
  • Natural selection results in species that are better adapted to their environment
  • Phylogenetic system
    Allows for us to see evolutionary relationships
  • Genetic diversity
    The number of different alleles of genes in a population.
    • Factor allowing natural selection to occur
  • Directional selection
    Environment against an extreme of an allele.
  • Stabilising selection
    Environment against both extremes.
  • Same species if they are able to produce fertile offspring
    Same number of chromosomes
    • Can form homologous pairs
    • Meosis can occur.
  • Courtship behaviour
    Necessary precursor to successful mating
    • Role in species recognition.
  • Phylogenetic classification system
    Arrange species based on their evolutionary origins and relationships.
    • Hierarchy which smaller groups are placed within larger groups, with no overlap between groups
    • Each group is called a Taxon (plural taxa)
  • Species richness
    Measure of the number of different species in a community.
  • Index of diversity
    Describes relationship between the number of species in a community and the number of individuals in each species.
  • Farming techniques reduce biodiversity.
  • Genetic diversity can be made by comparing
    • Frequency of measurable or observable characteristics
    • Base sequence of DNA
    • Base sequence of mRNA
    • Amino acid sequence of the proteins encoded by DNA and mRNA.
  • Quantitative investigations of variation within a species involve:
    • Collecting data from random samples
    • Calculating a mean value of the collected data and standard deviation of that mean
    • Interpreting mean values and their standard deviations
  • Spearman’s Rank
    Used to find strength of correlation between two sets of continuous data
  • T-test
    Find the difference between means
  • Chi-squared test
    Used to compare separate categories, discontinuous data.
  • Index of diversity
    Measures abundance of each species.
  • Data collection
    1. Method of selecting sampling sites at random
    2. Use of quadrant
    3. Identify species up close.