Mechanisms of Evolution
... What drives this ‘speciation’?
• Behavioral• Geographical• Temporal-
Genetic v. Culural Evolution
... Signs of symbolic thought processes in
sculpture, wall paintings and adornments
do not appear until 35 000 years ago
A fundamental change is thought to have
occurred about 60 to 70 000 years ago
But is this an artefact of preservation?
No Slide Title
... Feldman and Cavalli-Sforza (1989) modelled the relationship
between the spread of the gene for lactose absorption and the
spread of the cultural trait.
Their analysis supported the hypothesis that the cultural practise
of dairy farming created the selection pressure favouring this gene.
Book Review Evolution in 4 dimensions
... developmental processes that can explain trends in evolutionary change that
have thus far been inpenetrable, eg: genetic assimilation. This is the
mechanism, recently established, where elements of behavioural sequences,
eg: song, or elaborate nest building are built over evolutionary time by some
... • Homologous features- similar structure in
• Analogous features - similar function
different structure (convergent evolution)
• Vestigial organs
Chapter 11 - Amazon Web Services
... • Ecological approaches stem from geographical theories relating the region in
which a culture is found to its subsistence practices. In American
anthropology this eventually became the culture and food area concepts of
the early 20th century.
© 2014 Mark Moberg
Biology Quiz 2 Answers and explanations Note there were two forms
... weeds could become resistant, therefore the product would no longer be effective, and 2) genetic
diversity of the weeds could decrease after continued selection. This was an analogous example
to bacteria and selection by antibiotics. A third possibility exists (but not an answer on the quiz);
no evo ...
... have evolved from life forms that first developed more than 3 billion years ago
Outline the process of evolution by natural selection: differences between genes causes
variation within a species; some individuals are best suited to survive and reproduce; the
genes that enabled these individuals to s ...
The Major Transitions in Evolution
... On human cooperation III.
• These culturally transmitted practices
presuppose advanced cognitive and
linguistic capacities, possibly accounting
for the distinctive forms of altruism found
in our species.
What do I need to know for the test?
... How is the number of phenotypes related to the number of genes that control the trait?
What type of distribution curve can be seen with polygenic inheritance?
Tell the 3 ways natural selection can affect the distributions of phenotypes in a bell-shaped curve?
Be able to identify examples of each of ...
What you need to know for the Packet 11 test:
... Prentice Hall Review Book pages 71-86 (all information)
Textbook-You should refer to chapters 15, 16 and 17, however, you
are not responsible for all information. You should have a clear
Evolution and Classification Review
... • Darwin’s visit to these islands, the
differences in the animals, and his
observations that habitat can affect the
adaptations of organisms.
Dual inheritance theory
Dual inheritance theory (DIT), also known as gene–culture coevolution or biocultural evolution, was developed in the 1960's through early 1980s to explain how human behavior is a product of two different and interacting evolutionary processes: genetic evolution and cultural evolution. In DIT, culture is defined as information and/or behavior acquired through social learning. One of the theory's central claims is that culture evolves partly through a Darwinian selection process, which dual inheritance theorists often describe by analogy to genetic evolution.'Culture', in this context is defined as 'socially learned behavior', and 'social learning' is defined as copying behaviors observed in others or acquiring behaviors through being taught by others. Most of the modeling done in the field relies on the first dynamic (copying) though it can be extended to teaching. Social learning at its simplest involves blind copying of behaviors from a model (someone observed behaving), though it is also understood to have many potential biases, including success bias (copying from those who are perceived to be better off), status bias (copying from those with higher status), homophily (copying from those most like ourselves), conformist bias (disproportionately picking up behaviors that more people are performing), etc.. Understanding social learning is a system of pattern replication, and understanding that there are different rates of survival for different socially learned cultural variants, this sets up, by definition, an evolutionary structure: Cultural Evolution.Because genetic evolution is relatively well understood, most of DIT examines cultural evolution and the interactions between cultural evolution and genetic evolution.