Exam 24: Evolutionary Genetics

Which of the following is a disadvantage of protein gel electrophoresis? 1)Nonsoluble,hydrophobic proteins cannot readily be analyzed. 2)It focuses on gene products rather than on the genes themselves. 3)It tells nothing about variation in the nongenic portion of a genome.

In evolutionary genetics a group of populations that share a common gene pool is known as a/an

How can the rate of evolution be determined using a phylogenetic tree? 1)Link the branch points of a tree to specific times in the evolutionary history of the sequences 2)Link the common ancestor to a specific evolutionary era in history 3)Link the analogous sequences to specific times in evolutionary history

The best phylogenetic tree is one that requires the fewest mutational changes to explain the evolution of all the tree's sequences from a common ancestor.This is known as

Which type of evidence was used by Darwin to propose that species evolve?

Different colored bands on the shells of land snails would be classified as what type of variation?

In the study of polytene chromosomes among Drosophila it was determined that: 1)Different arrangements predominated different geographical regions. 2)Frequencies of the arrangements changed seasonally. 3)Long-term changes in the frequencies of arrangements occur in some populations.

How do geneticists explain the variation in evolution rates?

Which of the following would be the best example of polymorphisms changing in various environments?

Which of the following is not a common feature shared by the methods used to construct a phylogenetic tree?

The status of the Duffy polymorphism for blood type varies among

Darwin proposed that a species changes as a result of

Which of the following is not an advantage of studying evolution through the use of DNA and proteins?

Nucelotide differences that have no effect on the amino acid sequence of the polypeptide are known as

Which of the following is not considered a polymorphism?

What are the advantages of studying evolution using DNA and protein sequences as compared to more traditional methods such as comparative anatomy and physiology?

What can be can be determined by calculating the average number of amino acid or nucleotide changes that have occurred per site in a molecule since two or more evolving lineages diverged from a common ancestor? 1)The amount of phenotypic evolution 2)The rate of molecular evolution 3)The future of phenotypic evolution

Which of the following principles grounded Darwin's work and allowed for an explanation of how variations are inherited? 1)Wallace's theory of inheritance 2)Mendel's principles of inheritance 3)Morgan's principles of inheritance

Even if they have diverged significantly from the ancestor and are different from each other descendants of an ancestral DNA or protein sequence are said to be

Allozymes differ from each other by