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Evolution
Biol 415 UNR Holzer
22
Biology
Undergraduate 4
02/14/2011

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Term
Define allele
Definition
versions of the same gene that differ in their base sequence
Term
Transversion
Definition
a point mutation where a purine is changed to a pyrimadine or vice versa
Term
homology
Definition
similarities of species cuz of duplicated genes derived from same common ancestral sequence
(can have same function or diff)
Term
blending inheritance
Definition
genes act like pigments in pain
favorable mutations merge into existing traits & r lost
Term
Hardy Weinburg Equilibrium
Definition
allele frequencies in a population will not change
if allele is p & q, genotype would be p^2, pq & q^2
if all rules are met
Term
frameshift mutation
Definition
single nucletide insertion or deletion causing problems all the way down the line
usually an early stop
Crohn's Disease
Term
Identity by Descent
Definition
Two or more alleles are identical by descent (IBD) if they are identical copies of the same ancestral allele
Term
inheritance of acquired characteristics
Definition
physiological changes acquired in the life of an organism may be transmitted to offspring.
aka theory of adaptation orLamarckism
Jean-Baptiste Lamarck
Term
polymorphism
Definition
two or more clearly different phenotypes exist in the same population of a species — or the occurrence of more than one form or morph.
heritable
natural selection
Term
The Modern Synthesis
Definition
broad based effort in 1930-40 to unite mendelian genetics with theory of evolution by natural selection
aka evolutionary synthesis
Term
evolutionary substitution
Definition
compare diff species
if they have diff nucleotides in same space, then at least one substitution must have occured in the lineage
Term
indel
Definition
1 or more bases that have been inserted or deleted from genome.
Term
non synonomous mutation
Definition
point mutations that result in an amino acid chagne
aka replacement
creates a new allele
Term
heterozygosity
Definition
the fraction of individuals in a pop that are heterozygotes
Term
subpopulation
Definition
subdivision of a population
Term
mutation/drift balance
Definition
drift oposses mutation. they eventually come into equilibrium.
Term
gene flow
Definition
(also known as gene migration) is the transfer of alleles of genes from one population to another. via migration or wind
Term
inbred/outbred
Definition
the average relatedness between
mates is greater than the average relatedness
among randomly paired individuals!
– A population can be inbred
crossing between unrelated individuals
Term
effective population size
Definition
Ne
the size of an ideal random mating population with no selection mutation or migration that would lose genetic variation via drift at the same rate as it is observed in an actual pop
Term
heritability
Definition
fraction of teh total phenotypic variation in a pop that is caused by genetic differences among ppl. or the fraction of total variation that is due to additive effects of genes.
Term
spandrel
Definition
space between an arch and a rectangular enclosure
Term
MRSA
Definition
methacilian resistant staphlococus areus
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