BIOLOGY 1M03 Lecture Notes - Lecture 4: Spalax, Sebaceous Cyst, Allele Frequency

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blackherring683

14 Jan 2017

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Today"s lecture: more evidence for evolution studying natural selection melanism in moths antibiotic resistance. Darwin"s nches genetic basis of selection: candidate gene approaches (darwin"s nches and mice in white sands nebraska) myths about evolution evolutionary constraints. Evidence that species are related: genetic and developmental homology. Homology is a similarity that exists in species that was inherited from an ancestor. Genetic homology is a similarity among species in dna sequences, gene content, or other genetic attributes that is due to shared ancestry. Developmental homology is a similarity among species in embryonic traits that is due to shared ancestry. Evidence that species are related: developmental homology gill pouches of chicks, humans and domestic cats. Branchial left cyst: this is a congenital epithelial cyst that is derived from the branchial arches that are normally reabsorbed during embryonic development in sh, these arches develop into gills.

Related Questions

Random, chance events that change allele frequencies are knownas:

A. Gene flow

B. Genetic drift

C. Natural selection

D. Balancing selection

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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

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Question 31 pts

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

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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

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Question 51 pts

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

True

False

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Question 61 pts

Genetic evidence suggests that humans and Neandertals neverinterbred.

True

False

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Question 71 pts

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

True

False

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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

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Question 91 pts

Patterns of evolution can be seen above the species level

True

False

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Question 101 pts

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