Topic 4 & 5

Question 1

Why is the term “race” problematic from a biological perspective?

Answer 1

Racial categories are discrete but human variation is continuos

Question 2

What is the difference between intra sexual and inter sexual?

Answer 2

INTRA = within the same sex :males competing for females
Inter= between the two sexes : male peacock tale

Question 3

what is polymorphism?

Answer 3

clearly show two different phenotypes (moth)

Question 4

What is the difference between anagenesis and cladogenesis

Answer 4

Anagenesis- evolution over a single lineage

Claudogenesis- one ancestral species branches two new species

Question 5

what are the forces of evolution?

Answer 5

mutation, gene flow, genetic drift, natural selection

Question 6

Gene flow

Answer 6

lead to change quickly, depends on migration rate between two populations

Question 7

Genetic drift

Answer 7

change due to random effects 
sampling error (pop size too small)

Question 8

What are homologous and analogous traits, and how are they related to convergent evolution?

Answer 8

homologous- two species share traits with common ancestor
analogous: looks similar different origin
converging same trait