USC BISC 120 Exam 2 questions with correct answers

USC BISC 120 Exam 2 questions with
correct answers


Heterochrony - CORRECT ANSWERS ✔✔Evolutionary change in
the rate or timing of developmental events (ex: human and chimp
skulls)


Paedomorphosis - CORRECT ANSWERS ✔✔Sexually mature
species may retain body features that were juvenile structures in an
ancestral species


Macromutation - CORRECT ANSWERS ✔✔Instantaneous change
in an organism with no intermediate species (heterochrony &
paedomorphosis)


Homeotic (Hox) Genes - CORRECT ANSWERS ✔✔Determine
where on body specific features will develop


Monophyletic Clade - CORRECT ANSWERS ✔✔group on a
phylogenetic tree that includes common ancestor and all



1/9

, descendants


Paraphyletic Clade - CORRECT ANSWERS ✔✔group on a
phylogenetic tree that includes common ancestor and most
descendants (not all)


Polyphyletic Clade - CORRECT ANSWERS ✔✔group on a
phylogenetic tree that includes one ancestor and some/all
descendants and descendants of a different ancestor


Homologies - CORRECT ANSWERS ✔✔similarities between
organisms that forms the basis of a phylogenetic tree (can be
physical or genetic)


Orthologous Genes - CORRECT ANSWERS ✔✔similar genes
between species because the species share a common ancestor
(product of speciation)


Paralogous Genes - CORRECT ANSWERS ✔✔genes similar to
each other within a species, often created through gene duplication
(within species)




2/9