Natural Selection (U7)
Who developed natural selection?
Charles Darwin
True or False: The environment can impact the phenotype?
True
What are the four macromolecules?
Carbohydrates, proteins, nucleic acids, and lipids
Define osmosis
Movement of water molecules from a high concentration of water to an area with low concentration
What is the result of transcribing DNA?
RNA
Define "disruptive selection"
Favoring two extremes
What are the 4 phases of meiosis?
Prophase 1, Metaphase 1, Anaphase 1, and Telophase 1
What are lipids composed of?
CHOP (carbon, hydrogen, oxygen, and phosphorus)
What is the function of the nucleus?
Source genetic info. and synthesis of RNA
What is a missense mutation?
Change from one amino acid to another
Define founders effect.
Small population isolated from original population
Define codominance inheritance pattern
Heterozygous is both dominant traits in organism
What is the monomer of carbohydrates?
Monosaccharide
What is the shape of a vacuole?
A kidney bean shaped
What is the difference between a purine and pyrimidine?
Purine has a double ring structure: Pyrimidine has a single ring structure
What is the difference between sympatric and allopatric speciation?
Allopatric is when species are isolated due to geographical differences: Sympatric is when speciation occurs in same place
When does independent assortment take place in meiosis?
What are the differences between DNA and RNA?
DNA contains thymine and RNA contains uracil.
Where are chloroplasts found in the cell?
plants
What is the function of helicase?
Unwinds DNA strand
Red (p2)=200/1000=.2
Pink (2pq)=300/1000=.3
White (q2)=500/1000=.5
Define phenotype plasticity.
Result of enviromental factors influencing gene expression
Define surface tension
Cohesion develops a "surface" based on the interaction of hydrogen bonds
Whats the structure of mitochondria?
Double membrane
What are the steps for PCR?
1. Heating
2.Cooling
3.Annealing