yahoo
what are the possible post-zygotic isolation mechanisms?
hybrid inviability
hybrid sterility
hybrid breakdown
who believed that all life could be arranged on the scala naturae (scale of nature)?
aristotle
what are charles darwin's major ideas?
descent with modification
natural selection
speciation
what are the pre-zygotic barriers that may block fertilization after mating is attempted?
gametic isolation
mechanical isolation
what did jean baptiste lamarck believe?
"use and disuse"
inheritance of acquired traits
an allele that was no variation at the gene locus is...
fixed
what is required for speciation to happen?
no gene flow
genetic divergence (natural selection, mutation, genetic drift)
reproductive isolation
what is the selective breeding for a desired trait?
artificial selection
what are the 3 kinds of homologies we discussed in class?
molecular or genetic
embryological or developmental
anatomical or structural
what are the pre-zygotic barriers that block mating?
habitat
temporal
behavioral
what is a trait that gives an organism a reproductive advantage in its environment?
adaptation
the total composition of genes in a population at a specific time is called...
the gene pool