BIO 1130 Lecture Notes - Lecture 4: Sympatric Speciation, Paraphyly, Polyphyly

14 views3 pages

pearcoyote30

4 Oct 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

cudapuca and 38677 others unlocked

BIO 1130 Full Course Notes

Verified Note

25 documents

Document Summary

Lecture 4. 1 - major events in the history of biology: modern theory of evolution and more. Advanced characters characteristics that are developed or more modified. Allopatric speciation the evolution of reproductive isolating mechanisms between two populations that are geographically separated - location change, gene flow does not occur due to physical barrier. Anagenesis - species formation without branching of the evolutionary line of descent; no remnants of other population (now considered extinct), old species is ancestry of new species it morphed into. Apomorphy given score of one/plus; a new derived trait that is unique to a species and can be used as a defining characteristic. Autoapomorphy a derived trait that is unique to a taxon. Autopolypoloidy having more than two sets of chromosomes all derived from the same species. Behavioural isolation - a prezygotic reproductive isolating mechanism in which two species do not mate because of differences in courtship behavior; also known as ethological isolation.

Related Questions

Random, chance events that change allele frequencies are knownas:

A. Gene flow

B. Genetic drift

C. Natural selection

D. Balancing selection

Flag this Question

Question 21 pts

What type of selection acts to maintain the two extremephenotypic variants in a population?

A. Disruptive selection

B. Directional selection

C. Positive selection

D. Artificial selection

Flag this Question

Question 31 pts

Approximately, how much of our DNA is shared with our closestrelatives, chimpanzees?

Flag this Question

Question 41 pts

The large canines of male baboons are likely the result of________, while the fact that some male baboons are very colorfulis probably the result of _______.

A. Mutation; balancing selection

B. Gene flow; sexual dimorphism

C. Male competition; female choice

D. Mate choice; genetic drift

Flag this Question

Question 51 pts

Negative assortative mating results in an increased frequency ofhomozygous genotypes within a population.

True

False

Flag this Question

Question 61 pts

Genetic evidence suggests that humans and Neandertals neverinterbred.

True

False

Flag this Question

Question 71 pts

The specific variant of the FOXP2 gene associated with languageacquisition in humans is found in both humans and Neandertals.

True

False

Flag this Question

Question 81 pts

Industrial melanism describes the change in moth color from paleto dark after pollution from factories resulted in coating treetrunks with a layer of dark soot. Which statement is trueconcerning industrial melanism?

A. After pollution levels increased, all moths became darkercolored because soot got on their wings

B. The dark moths survived better after pollution levelsincreased because they were not poisoned by the pollutants

C. Individual moths changed their color in response to thepollution

D. Dark moths were present in the population before pollutionlevels increased

Flag this Question

Question 91 pts

Patterns of evolution can be seen above the species level

True

False

Flag this Question

Question 101 pts

Inbreeding is problematic because it increases the probabilitythat offspring inherit two copies of a recessive mutation thatcauses disease.