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EEB 184 Exam Study Guide.
Plasticity - answer✔refers to the property by which the same genotype produces distinct
phenotypes depending on the environmental conditions under which development takes place.
ecdysone - answer✔the major steroid hormone in insects; coordinating developmental
transitions such as larval molting and metamorphosis
ecdysteroid - answer✔levels of this hormone increase before eyespot development in butterflies
(temporal correlation)
enabling mutation - answer✔allows organism to become plastic
(genetic alteration conferring environmental sensitivity to a phenotype that was originally not
plastic. This allows the expression of plasticity, which can thereafter be shaped by selection)
genetic accommodation - answer✔you have a plastic response and then you have evolutionary
change that affects what/how large that plastic response is
(the process by which selection shapes the properties and/or magnitude of a plastic response)
genetic assimilation - answer✔ex. butterfly spots change due to seasons but something happens
so that the descendants always have big eye spots
(refers to the process of genetic accommodation by which there is the fixation of what were
previously environmentally induced phenotypes)
JH - answer✔corpora allata gland secretes...
ecdysone - answer✔prothoracic gland secretes...
neck - answer✔to block the corpora allata (JH), ligate the...
no color change - answer✔When caterpillar ligature was placed behind the neck
corpora allata - answer✔cue from ___________ required for color change in polyphenic line
(tabacco worm)
buying time hypothesis - answer✔being plastic gives you time for mutations to arrive so you
can adapt to an environment
EEB 184 Exam Study Guide.
Plasticity - answer✔refers to the property by which the same genotype produces distinct
phenotypes depending on the environmental conditions under which development takes place.
ecdysone - answer✔the major steroid hormone in insects; coordinating developmental
transitions such as larval molting and metamorphosis
ecdysteroid - answer✔levels of this hormone increase before eyespot development in butterflies
(temporal correlation)
enabling mutation - answer✔allows organism to become plastic
(genetic alteration conferring environmental sensitivity to a phenotype that was originally not
plastic. This allows the expression of plasticity, which can thereafter be shaped by selection)
genetic accommodation - answer✔you have a plastic response and then you have evolutionary
change that affects what/how large that plastic response is
(the process by which selection shapes the properties and/or magnitude of a plastic response)
genetic assimilation - answer✔ex. butterfly spots change due to seasons but something happens
so that the descendants always have big eye spots
(refers to the process of genetic accommodation by which there is the fixation of what were
previously environmentally induced phenotypes)
JH - answer✔corpora allata gland secretes...
ecdysone - answer✔prothoracic gland secretes...
neck - answer✔to block the corpora allata (JH), ligate the...
no color change - answer✔When caterpillar ligature was placed behind the neck
corpora allata - answer✔cue from ___________ required for color change in polyphenic line
(tabacco worm)
buying time hypothesis - answer✔being plastic gives you time for mutations to arrive so you
can adapt to an environment
