chapter 17
What was the first theory of inheritance? Who made it up?
Blending inheritance-- Gregor Mendel
What is the definition of evolution?
heritable changes of characteristics in a population from one generation to the next
Definition of a population
groups of the same species interacting in the same environment
what is reproductive isolation?
one species can only interbreed with the same species
who studies fossils? how is age determined?
paleontologists; radiometric dating
What is an allele? Give me an example of a homozygous dominant allele.
A specific segment of a gene--> AA
What is natural selection? Who coined it?
traits that are more successful or fit are passed down; Charles Darwin
humans in Oxford gain increasingly worse traits as time passes. this is what type of evolution?
microevolution
what is the drawback of morphological traits when determining species?
if two species look similar
give three examples of environmental changes that can cause extreme population changes
temperature, landmasses, floods, glaciers, volcanoes, meteor, atmosphere
What is the difference between genotype and phenotype?
A genotype is the genetic makeup, a phenotype is observable traits
What is a homology? What about a molecular homology?
Sharing traits between a common ancestor. Comparing DNA, RNA or proteins
a flood occurs that causes there to be less animals on land. this is an example of...
bottleneck effect; genetic drift
speciation is...
the generation of a new species
What is spontaneous generation? what is reducing atmosphere theory?
What is the law of independent assortment? What about the law of segregation?
Pairs of alleles express independently; alleles segregate in meiosis for gametes to carry one set of traits
A giraffe with a long neck is able to reach the tall trees and eat. This trait is passed down to their offspring. This is...
Natural selection
MSU people are having fun in the district when ole miss people come in and ruin the fun, causing MSU ones to leave. this is...
migration
what is the drawback of molecular feature comparisons of species?
It's difficult to know where to draw the line
nucleotides and amino acids formed and made C, H, O N. what stage of life is this?
one
Describe x-linked recessive disorders. Who is more likely to have them and why?
the affected recessive allele is carried by an X from the mother. Men are affected more because they have one X
large seeds are all eaten, so the small beak finches that eat small seeds pass down the small beaked trait. what happens next?
the small seeds become rare, so then the large seeds are eaten more and the large beaks are passed down.
Lebby moves to MSU, brings in Shapen from the transfer portal, and they're putting a new team together. this is...
founder effect
Give three things we can use to identify a species (some were said)
reproductive isolation, morphological, ecological, evolutionary, molecular
what is the third stage of life?
protobionts-- pre-cells are made when polymers have closed membranes