Exam 2 Flashcards
Biological Anthropology
a study of anatomical and biological aspects of humans and our ancestors
Biocultural Approach
studying the close relationship between human biology and culture
What are the subfields of bio anthropology?
osteology, paleoanthropology, paleoprimatology, forensic anthropology
Osteology
the study of the skeletal system
Paleoanthropology
the study of hominins
Paleoprimatology
the study of ape ancestors
Forensic Anthropology
applying knowledge to ID the cause of death outside the care of a physician.
What is science?
the study of the natural world, the method of observing and measuring things systematically.
Observations
recording input from senses or tools
Hypothesis
a testable explanation for the observations made
Data
must be collected, analyzed, and re-tested. It must explain something about the world and can be falsifiable.
Theoretical Framework
the foundation of knowledge based on interconnecting hypothesizes
What theoretical framework is the basis of bio anthropology?
evolution
What was the goal of early physical anthropology?
scientists were concerned with the categorization of humans and how to name them
Earnest Hooton
creator of phrenology, “palm reading” for the skull. He believed that the bumps on a person’s skull could tell personality and criminality. Racial classification. Did some good work for orangutan teeth.
W.W. Howells
Hooten’s student; disproved race theory by measuring heads and finding zero clustering or correlations.
Carleton Coon
Hooten’s student; wanted to continue classifying humans by race. He upheld his theory despite being proven wrong several times. “Origin of Races”, upheld Jim Crow Laws
Ashley Montague
a professor who shared Boaz’s idea of cultural relativism. He believed that humans were equal. UN committee of equality.
Sherwood Washburn
Hooten’s last student; The face of biological anthropology as we know it today. He spoke to geneticists, anatomists, and primatologists because he believed that anthropology could benefit and learn from these fields of study. Human bio-culturalism is the result of evolution.
Typology
the classification that separates all living things into a species and genus, also known as Binomial Nomenclature
Carolus Linnaeus
Swedish botanist and zoologist, “father of modern taxonomy” as he developed the Binomial Nomenclature system
Samuel G. Morton
North American doctor in the 1800s; interested in codifying human variation, collected heads. He believed that people of African descent had small brains compared to people of European descent, who had large brains.
Ales Hrdlicka
doctor in the 1900s who wanted to establish physical anthropology institutions in the US. He wanted to study how to measure humans and come to an agreement regarding the classification. He created the American Journal of Physical Anthropology and was only interested in studying white men- who he believed to be the apex.
What is physical anthropology like now?
began in the 1950s when scientists began to study the process of primate evolution and human variation. Darwinism began to be interpreted with genetics. Races are studied as populations, not types or species of humans. They study migration, gene flow, genetic drift, and mutation. Adaptation of form to function.
What is biological evolution?
change in allele frequencies in a population from one generation to the next
Units of evolution
population
Natural selection
Beneficial alleles increase in frequency over time in a population because it increases survival/reproduction in individuals with those alleles
Mutation
Source of new allele variation; random. Most are neutral or not noticeable.
How can a mutation be inherited?
The mutation must occur in the parent’s gametes.
Gene flow
movement of genetic material from one population into another; non-random, affected by barriers
Why is gene flow non-random?
individuals chose to re-locate in order to gain access to new resources.
Genetic drift
Random changes in allele frequencies in a population from generation to generation and lack directions. Random allele changes from individual death
What is the only source of new alleles?
mutation
Which event has a big impact on small populations?
genetic drift
Sickle cell allele
sickle cell anemia causes red blood cells to sickle, increasing the chances of life-threatening blood clots. However, in areas affected by malaria, sickle cell is advantageous bc plasmodium cannot affect the blood cells and reproduce.
Example of gene flow barrier
The development of the Sahara desert caused animals to be trapped or forced to migrate. This is why there are two species of elephants, one in Africa and one in Asia.
Founder’s effect
A small number of individuals create their own population, there is a shift in alleles from mother population to new population
What are the consequences of the Founder’s effect?
the gene pool shrinks, and few alleles are left. If a disease or genetic disorder is present in the founding population, it could become more common.
Speciation
species integrity is maintained by gene flow, interruption of gene flow leads to speciation.
Stasis
species stays the same
Anagenesis
one species changes to another over time
Cladogenesis
species splits off into other species
List all of the functions of bones
protection, support, respiration, mineral storage, locomotion, hearing, hematopoiesis
Structure as a function
the body structure is supported, the bones keep the soft tissues and spinal chord in place
Protection as a function
important organs such as the brain and heart are protected by bone
Respiration as a function
the muscles and bones in the chest help increase and decrease pressure within the lungs