BIOLOGY 1M03 Lecture Notes - Lecture 4: Branchial Cleft Cyst, Sebaceous Cyst, Antimicrobial Resistance

91 views3 pages

blushcoyote303

12 Jan 2017

School

Department

Course

Professor

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

Document Summary

Studying natural selection: melanism in moths, antibiotic resistance, darwin"s finches. Homology: a similarity that exists n species that was inherited from an ancestor. Genetic homology: a similarity among species in dna sequences, gene content or other genetic attributes. An identical or almost identical system is used by all known organisms to store the sequence of amino acids in proteins in nucleotides. Transcription of dna , translation of rna. Mutations in homologs of the same gene cause abnormal development in many diverged species. Ex: embryos of chicks, humans and cats develop gill pouches similarity in developmental processing. Branchial cleft cyst: this is a congenital epithelial cyst that is derived from the branchial arches that are normally reabsorbed during embryonic development. Limbs modified to carry on different mutations through natural selection, reproduction, etc. Why does homology matter: missed it look on slide on avenue. Individuals in a population vary in their traits (variation) Some of these trait differences are heritable (heritability)

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.