BIOL SCI 150 Study Guide - Midterm Guide: Homo Sapiens, Homo Erectus, Mitochondrial Eve

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MIDTERM #3
DEFINITIONS:
Hominin:
Individuals from the large family of close relatives to homo sapiens.
Australopithecus:
Lived roughly 3.2 million years ago. Early ancestor of humans. Hominid. Small
brained. Bipedal.
Cro-Magnon Man:
One of first fossils recognized as being homo sapiens discovered in a cave in
France from about 40,000 years ago.
Endosymbiotic Theory:
Both chloroplasts and mitochondria were once free living cells (Prokaryotes).
Eventually, they ended up inside the same organism, and worked better together
than apart so eukaryotic cells developed.
Mitochondrial Eve:
Lived in East Africa about 200,000 years ago. The hypothetical most recent
common ancestor of all living humans. Has a certain mt sequence that has been
passed down in every generation since.
Haplogroup:
A term used to describe a group of mitochondrial sequences that are more closely
related to one another than to others, indicated a recent common ancestor for the
group.
L1, L2, L3, N, M:
Haplogroups of the early development of the species in Africa. L1, L2 stayed in
Africa and L3 is the group that migrated into the Middle East. N mitochondria
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