test 2 Flashcards
change in trait making bearer better suited to survive / reproduce
adaptations
Method of Lederber’s to demonstrate mutation as a random process
Replica plating
involves abnormal placement of body parts
homeotic mutation
humans are the “asteroid” bringing about the ____ mass extinction
sixth
codes for a stop codon and can truncate protein
nonsense mutation
the difference in trait means of a population before and after selection
selection coefficient/ differential
bad mutations accumulate irreversibly, increasing genetic burden
muller’s ratchet
explain how rare reptiles successfully colonize islands
rafting
involve duplication of chromosomes in a hybrid of 2 species
allopolyploid
insertion or deletion of a single base in the DNA sequence
frameshift mutation
taxa evolved separately to occupy similar niches in different areas
ecological equivalence
certain species live in one place and nowhere else
endemism
selects against less adapted individuals at one tail of the distribution
directional selection
fragmentation of a continuous distribution by the emergence of a barrier
vicariance
asexual lineages grow faster in each generation because all offspring (females) can reproduce
two fold cost of sex
account for the present distribution of Psychotria trees across the Hawaiian archipelago
dispersal
general type of mutation involving passage to descendants through gametes
germ line