test 4 matching Flashcards
female birds choose a mate bases on song quality. this is an example of a ________ reproductive barrier
behavioral
any barrier to hybrid success that occurs after the zygote is formed is called a ___________ barrier
postzygotic
_________ speciation occurs without geographical isolation
sympatric
HIV is an example of ___________
retrovirus
a _________ is a group of populations whose members have the potential to interbreed in nature and produce viable offspring.
species
________ enzymes are enzymes that bacteria have as defense against bacteriophages
restriction
the protein shell enclosing the viral genome is called a ____________
capsid
_______ are the remains or traces from the past usually found in sedimentary rocks
fossils
_______ evolution is the independent evolution of similar features
convergent
the _______ consists of all of the copies of every type of allele, at every locus, of all members of a population
gene pool
bottleneck and flounder effects are examples of ________________
gene flow / genetic drift
_________ is the transfer of alleles into or out of a population due to the movement of fertile individuals or their gametes
geneflow
birthweights (usually narrow distribution) are an example of ____________ selection
stabalizing
_______ selection occurs when members of one sex compete directly for mates of the opposite sex
intrasexual
one species reproduces only in the fall, another in the summer. this is an example of _________ isolation
temporal
a _______ is where two species meet and mate
hybrid zone
fossil evidence indicates horses have gradually increased in size over geologic time . this is an example of ____________ selection
directional
most of the human genome consists of ___________ DNA sequence
repetitive
genetic __________ must exist in order for evolution to occur
variation
a _________ is a harmless variant or derivative of a pathogen that stimulates the immune system to mount a defense against future infections of that pathogen
vaccine
the study of whole sets of genes and their interactions is called_________________
genomics
a widespread outbreak of a disease is called a _________
epidemic
when allelic frequencies in a population are changing, the population is NOT in hardy Weinberg _____________
equilibrium
a population has two alleles for 2% of its genes, this is called average ____________
heterozygosity
_________ are a source of genetic diversity
mutations
