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Human Origins and Variation
Exam 3
96
Other
Not Applicable
04/15/2007

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Term
Name the three specimens of Australopithicus
Definition
1) africanus
2) afarenis
3) anamensis
Term
Name the years in which africanus, afarensis, and anamensis lived
Definition
africanus (3.5- 2.5 mya)
afarensis (3.9- 3.0 mya)
anamensis (4.2- 3.9 mya)
Term
Name the five specimens that were found in ONLY East Africa
Definition
1) A. afarensis
2) A. anamensis
3) P. boisei
4) P. aethiopicus
5) Kenyanthropus platyops
Term
Name the two specimens that were found ONLY in South Africa
Definition
1) A. africanus
2) P. robustus
Term
Name the place Homo habilus existed
Definition
- East Africa and South Africa
Term
Name the place Homo erectus existed
Definition
- Africa, Asia, and Europe
- first human known outside Africa
Term
Name the places Homo sapiens sapiens or Crog- Magnon existed
Definition
- Africa, Near East, Asia, and Australia
- what about the New World? - not enough evidence to support this theory
Term
Name the person A. africanus was found by, and what specific specimen was found
Definition
- Found by Raymond Dart
- The Taung Child is the specimen of A. africanus (an intermediate or transitional specimen or "missing link")
Term
Name the traits of the Australopithicus
Definition
- broad nasal base, Y5 molars, brain larger than face but still more ape- like, suspensory adaptations, good biped not great, no sagittal crest, no flat dished face, no large cheek arches, no huge cheek teeth, and no robust cranial bones- more gracial, and hieght is smaller than humans being 3 to 5 feet because of sexual dimorphism
Term
Name who recovered A. afarensis and the specific specimen found and any special traits
Definition
- A. afarensis was recovered by Johanson, White, and Coppens
- The specific specimen found was Lucy who was sexually dimorphic and used trees
Term
Name the person who recovered A. anamensis
Definition
- Meave Leakey
Term
Name the traits of Paranthropines
Definition
- had sagittal crest, flat dished faces, large cheek arches, huge cheek teeth, and robust cranial bones, good not great bipeds, more ape-like brain, most likely to be omnivores with a tough, fibrous diet due to their stratch marks and large pits in their dental enamel
Term
Name the three specimens of Paranthropines and how long ago that they existed
Definition
1) P. robustus (1.9- 1.0 mya)
2) P. Boisei (2.3- 1.4 mya)
3) P. aethiopicus (2.5 mya: the oldest paranthropine)
Term
Name the person who recovered P. robustus
Definition
- Broom recovered P. robustus
Term
Name the person who found P. boisei and the specific specimen that was recovered
Definition
- Mary & Louis Leakey recovered P. boisei and the specimen found was nicknames "Nutcracker Man" or Zinj because of who sponsered the site
Term
Who recovered P. aethiopicus and what was the nickname given to the specific specimen found
Definition
- P. aethiopicus was recovered by Richard Leakey and the nickname was give the "Black Skull"
Term
Name the person who found Kenyanthropus platyops and the dates it was thought to have existed
Definition
- the Third Pliocene Genus
- found by Meave Leakey
- existed 3.5 mya
- shares some features with Australopithecines & others with Paranthropines
Term
Name the dates that Homo habilis and Homo erectus existed
Definition
1) Homo habilis (2.3-1.6 mya)
2) Homo erectus (1.9 mya -200,000 mya)
Term
Name the person who recovered Homo habilis, the nickname it was given, and any specific traits associated with Homo habilis
Definition
- Louis Leakey recovered the specimen and nicknamed him the "Handyman"
- special traits include there stone tool culture which was labeled OLDOWAN and consisted of chopper and flake technology
Term
Name the three people who recovered specimens of Homo erectus and the nicknames that they gave them and the specific traits associated with those specimens
Definition
- Dubios discovered "Java Man"
- Davidson Black discovered "Peking Man" who both had a sagittal keel not crest and had Acheulean Stone Tool Industry which consisted of biface and hand ax that were more symmetrical and took more planning
- Richard Leakey found another and called it the “The Nariokotome Youth” which was a GREAT BIPED and all locomotor patterns and stature were like the modern humans because of the pelvis, tibia, and femur
Term
Name the differences that Homo erectus is distinct from Homo habilis
Definition
- cranial traits: sagittal keel, smaller cheek bones, jaws & teeth, face less prognathic, larger cranium & brain (brain-size within modern range)
postcranial distinctions: stature modern, most individuals well over 5 feet in height, locomotor adaptations at the pelvis, femur, & tibia are modern. Homo erectus was the first fully-facultative biped. Not merely a good biped, Homo erectus was a GREAT biped.
Term
Name the dates that Homo sapiens (Archaic) existed and their subspecies Homo sapiens neaderthals and Cro- Magnon (Homo sapien sapiens) existed
Definition
- Homo sapiens (Archaic)/ 900,000-250,000 mya
- Neanderthals (Homo sapiens neanderthalensis)- 300,000-30,000 mya
- Cro-Magnon, Us (Homo sapiens sapiens) - 190,000 to NOW
Term
Name the traits of neanderthalensis
Definition
- large nasal openings, enlarged, sinuses, mid- facial prognathism, occipital bun, larger brain, retromolar gap, short and robust bodies
- brain size is larger than ours but not when compared to body wieght
- cognitive skills are different than ours
- similiar use in motor control of tongue because of hyoid bone
- evidence inclusive when it comes to speech and language
- Cave Bear competition unlikely
- much like us, buried dead, had technology, art, and culture
- arise during glacial stage, have years of interglacial time period, and end in glacial age
- Have cold weather adaptations like Inuit Eskimos
- Within our stature range
Term
Where was the first Homo habilis found and by whom?
Definition
- the first Homo habilis was found at Olduvai Gorge by the Leakeys
Term
Name the 5 stages within the Teritary and the specimen that evolved within each other them and the dates
Definition
(K/T Boundary happened at 66 mya)
1) PALEOCENE (1st primates/ 66- 56 mya)
2) EOCENE (1st Halphorines/ 56- 34 mya)
3) OLIGOCENE (1st Catarrhines/ 34- 23 mya)
4) MIOCENE (1st Hominids/ 23- 5 mya)
5) PLIOCENE (first confirmed humans at 5 mya)
Term
Name the features of the genus Homo
Definition
- Increased brain and body size/ reduction of size of teeth especially molars and premolars/ obligate bipedalism/ increased reliance on stone tools/ increased sophistication of tools/ forehead/ evidence of parabolic dental arcade/ decreased maxillary prognathism/ first projecting nose, true nasal bones/ lack of sagittal crest, smooth cranial vault/ centrally positioned foramen magnum/ reduced nuchal crest
Term
Describe Oldowan tools
Definition
- Begins around 2.6 MYA/ East Africa/ Core tools, bifaces, choppers
Term
Describe Acheulian tools
Definition
- Begins around 1.65 MYA/ Hand axes
Term
Describe Mousterian tools
Definition
- not clearly defined who made it/ starts around 300- 250 KYA/ flake based
Term
Describe Upper Paleollithic tools
Definition
- High frequency of blades/ greater variety of tool types/ use of bone and antler as tools or parts of tools
Term
Name the characteristics of the Order Primates
Definition
- stereoscopic vision
- post- orbital bar
- petrosal auditory bulla
- nails (not claws)
- divergent hallux (Big toe) not same thing as Pollex (Thumb)
Term
Name the characteristics of the infraorder catarrhini
Definition
- yes ear tube/ two premolars/ 2.1 2.3/ Old World Monkeys, apes, and humans
Term
Name the characteristics of the infraorder platyrrhini
Definition
- No ear tube/ 3 premolars/ 2.1 3.3/ New World Monkeys
Term
Name the characteristics of the suborder Haplorhini
Definition
- dry nose/ no toothcomb/ closed eye orbit/ tear duct inside
Term
Name the characteristics of the suborder strepsirhini
Definition
- wet nose/ toothcomb/ open eye orbit/ tear duct outside
Term
Explain the bases that match eachother and the base pair rule
Definition
Four Bases:
- Adenine (A)
- Thymine (T)
- Guanine (G)
- Cytosine (C)
DNA Base Pair Rule"
A-T (U) and G- C
- bases always pair the same
Term
Define replication
Definition
- occurs during mitosis: or meiosis/ one celled organism divides into two new individuals
- Meiosis: cell division that results in sex cells/ only on gonads
- process by which a strand of DNA is duplicate (exactly)
Term
Explain protein synthesis and explain transcription and translation
Definition
Transcription:
- always occurs in nucleus
- segment of DNA that contains a particular code unwinds
o Nucleotide units of RNA are attracted
o Nucleotide units link together and mRNA

Translation:
- occurs in ribosome
- a Codon in 3 bases in mRNA that codes for a particular amino acid
End Result: Protein
Term
Describe Mendel's two laws
Definition
1) Law of Segregation: every person has two alleles for each trait, but in the formation of gametes those alleles segregate or separate so that only one allele for each trait is passed on to the offspring
2) Law of Independent Assortment: each pair of alleles segregates into different gametes independently (Ex. The inheritance of tongue rolling is independent of having a hitchhikers thumb)
Term
Explain what Pedigree Charts do and the difference between Autosomal dominant versus Autosomal recessive
Definition
Pedigree Charts
- Reconstruction of family relationships that shows the distribution of traits among members of the family
- Autosomal dominant: the number of affected individuals will tend to be more that unaffected individuals
- Autosomal recessive: the number of affected individuals will tend to be less than unaffected individuals
Term
Name the 6 earliest specimens and around what dates they existed
Definition
- Sahelanthropus tchadensis (6-7 mya)/ Orrorin tugenensis (6.2- 5.6 mya)/ Ardipithecus ramidus kadabba (5.8- 5.2 mya)/ Ardipithecus ramidus (4.4 mya)/ Kenyanthropus anamensis (4.2- 3.9 mya)
Term
Define Mendelian traits
Definition
- easily observable traits that are controlled by one gene
Term
Define gene
Definition
- segment of DNA that codes for a specific trait
Term
Deine allele
Definition
- alternative forms of genes
- ex. unattached earlobes and attached (dominant and recessive)
Term
Define continuous traits
Definition
- are expressed within a range of variation (think of fading light)
Term
Define discrete traits
Definition
- do not have a range of variation (think of turning off light)
Term
Define genotype vs. phenotype
Definition
- genotype is the genetic make- up of an individual while phenotype is the physically observable or measurable characteristic of an organism (ex. hair, skin...)
Term
Define a Carrier
Definition
- heterozygous that has one dominant
Term
Define homozygous versus heterozygous
Definition
- homozygous is when both alleles are the same while heterozygous is one dominate allele and one recessive in the genotype
Term
Explain sex cell versus Somatic cell
Definition
- sex cells are sperms and eggs and somatic cells are every other cell not relating to the reproductive cells
Term
Describe DNA
Definition
- Deoxyronucleic acid/ codes for amino acids that are essential for growth, development and the normal functioning of cells/ never leaves nucleus/ double stranded/ only molecule to replicate itself
Term
Define a nucleotide
Definition
- sugar/ phosphate/ base
- what DNA is composed of
Term
Define gamete
Definition
- a sex cell that is created in each parent during meiosis/ these cells are haploid cells. They contain: 23 chromosomes (22 pairs and one sex chromosome, either X or Y)
Term
Define zygote
Definition
- when two gamete cells unite they form this/ this is called a diplid cells that contains two complete sets of chromosomes, one from each parent (46 chromosomes)
Term
Define Natural Selection
Definition
- one of the mechanisms of evolution/ process by which individuals with favorable traits are more likely to survive and reproduce/ a trait must be inherited to have importance to natural selection
Term
Define reproductive fitness
Definition
- the number of offspring an individual produces and rears to reproductive age/ those who are more fit will produce more offspring
Term
Define selective pressures
Definition
- forces in the environment that influence reproducitve fitness/ an individual is adapted to one environment and may go extinct if the environment changes or if it is moved to a different environment
Term
Define morphological variant
Definition
- a phenotypic variant of the same species (result of genetic variation
Term
Define co- evolution
Definition
- the process whereby the effect of natural selection on one organism has an impact on organisms within the same environmental niche/ each party in a co- evolutionary relationship exerts selective pressures on the oter, thereby effecting eachothers evolution
Term
Describe macroevolution versus microevolution
Definition
- macro is evolution at the species level or above and takes a long time while micro occurs below the species level and occasionally we can see this kind of evolution
Term
Describe the following:
Anterior and posterior/ superior and inferior/ medial and lateral/ proximal and distal
Definition
- front and back/ top (towards head) and bottom (away from head)/ toward midline and away from midline/ nearest axial skeleton and away from axial skeleton
Term
Describe articulation
Definition
- the place where two adjacent bones come in contact
Term
Describe foramen
Definition
- an opening through a bone
Term
Describe fossa
Definition
- a depression (broad and shallow)
Term
Describe Condyle
Definition
- a rounded articular process
Term
Describe suture
Definition
- an immovable joint between two bones
Term
Describe dental arcade shape
Definition
- the shape formed by the teeth and bones of the jaw
Term
Define Canine Diastema
Definition
- a space in the jaws (in the front of the first premolar) that allows the jaws of animals with large canines to close
Term
Describe sectoral premolar
Definition
- a specialized first lower premolar that hones and sharpens
Term
Define dominance
Definition
- behavior in which one animal displaces another and takes preference in terms of sitting place, food, and females
Term
Define Matrilineal
Definition
- kinship is traced through the mother
Term
Define consort pair
Definition
- a temporary alliance between a male and female
Term
Define natal group
Definition
- the residence group that an individual is born into, as opposed to that group which one joins
Term
Describe mother- infant interaction
Definition
- bond between the mother and offspring that helps with child nutrition, social learning, and survival learning
Term
Define socialization
Definition
- the process by which an individual learns to adopt the behaviors of the community in which they live/ the individual will learn grooming friendship and other important social interactions
Term
Define evolutionary retention
Definition
- a trait that is present in a species because it has not changed since the time of its ancestor
Term
Describe primitive traits verses derived traits
Definition
- primitive traits are those traits that are inherited from distant ancestors where derived traits are those traits that just appeared by mutation, in the most recent ancestor
Term
Define adaptive radiation
Definition
- the evolution of an ancestral species into several new species within a relatively short period of time and in a certain geographic area (diversification)
Term
Describe hominid vs. hominoid
Definition
- A hominid is a bipedal ape while a hominoid is a term for all apes that are not obligate bipeds
Term
Define orthognathism
Definition
- opposite of prognathism, flat face
Term
Describe occipital torus/ bun
Definition
- sharply angled occipital bone/ bun
Term
Define supraorbital torus
Definition
- a heavy projecting "brow ridge"
Term
Define supraorbital sulcus
Definition
- "valley" above and beind the eye orbits
Term
Describe allometric growth
Definition
- pattern of growth whereby different parts of the body grow at different rates with respect to eachother
Term
Define anthropometry
Definition
- the study of measurements of the human body
Term
Describe bilophodont
Definition
- refers to a form of molar found in Old World monkeys consisting of four cusps wiht a small contriction separating them into two pairs
Term
Describe encephalization
Definition
- the increase in brain size over and beyond that explainable by an increase in body size
Term
Describe dental formula
Definition
- formal designation of the types and numbers of teeth (2.1 2.3/ 2.1 2.3)
Term
Describe Plesiadapiforms
Definition
- animals different/ not considered true primates but Archaic primates because they lack many of the features we see in living members of the order
Term
Describe Euprimates and the two types
Definition
- the first fossil mammals that show all of the features of true primates/ from Euocene/ two types are Adapids that show features that resemble the modern strepsirhini and Omomyids share features that resemble modern Haplorhines
Term
Describe Parapithecids and Propliopithecids
Definition
- primates from the Oligocene/ parapithecids are primitive while propliopithecids are more ape like
Term
Describe the Proconsul
Definition
- an early miocene primate found near Africa and Southeast Asia/ belonged to hominoids group
Term
Describe the Sivapithecus
Definition
- late miocene primates/ larger hominoids/ share qualities with orangatangs
Term
Describe Gigantopithecus
Definition
- late Miocene, Pliocene and Pleistocene ape that lived in Southest Asia/ thought to co-exist with humans/ had sexual dimorphism
Term
Describe what a Punnet Square does and a dihybrid cross
Definition
- Determine the genotype/ a cross taht examines two characteristics or traits simultaneuously
Term
Describe what a Pedigree Chart does
Definition
- reconstruction of family relationships that shows the distribution of traits amoung members of the family
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