Diversity, Classification and Variation- DNA Technology, Classification and Diversity Flashcards
What have new and improved technologies resulted in?
New discoveries being made and the relationships between organisms being clarified which can lead to classification systems being updated
What have advances in genome sequencing meant?
That the entire base sequence of an organism’s DNA can be determined
How does genome sequencing help to establish how closely related organisms are?
DNA base sequences can be compared and closely related species will have a higher percentage of similarity in their DNA base order
How does comparing amino acid sequence help with classification of organisms?
Proteins are made of amino acids and the sequence of amino acids in a protein is coded for by the base sequence in DNA
How does comparing amino acid sequence show related organisms?
Related organisms have similar DNA sequences and so similar amino acid sequences in their proteins
How does immunological comparison of proteins contribute to the classification of organisms?
Similar proteins will bind to the same antibodies
How were early estimates of genetic diversity made?
By looking at the frequency of measurable or observable characteristics in a population
What does a wide variety of characteristics indicate?
A high number of different alleles so a high genetic diversity
What is the problem with looking at different alleles to measure genetic diversity?
Different alleles will have slightly different DNA base sequences and will produce slightly different mRNA base sequences
