Transcript central.d127.org

Darwinism Populations Speciation Systematics
Potpourri
100 100 100 100 100
200 200 200 200 200
300 300 300 300 300
FINAL JEOPARDY!
Darwinism for 100
What two things must be true for a trait
to be described as an adaptation?
Heritable.
Improves chances of survival and
reproduction.
Environment-dependent.
Darwinism for 200
What did Darwin call his idea that orgs share
a common ancestry?
Descent with modification
Darwinism for 300
What are two things that must be true of a
population for natural selection to occur?
Genetic variation
Scarcity of resources
Differential survival and reproduction
Populations for 100
96% of uwrqpis have spotted wjls which are
caused by a dominant allele. How many
plain-wjled alleles would you expect in a
population of 85 uwrqpis?
34 plain alleles
Populations for 200
Daily Double!
What’s your wager?
How many heterozygous people would one expect in a population of
10,000 if 6400 have the recessive phenotype?
3200
Populations for 300
Give two reasons why the traditional species
definition is faulty.
Doesn’t work on orgs who are…
of the same gender
infertile
dead
Speciation for 100
How does an egg cell determine whether to
allow fertilization by a sperm cell?
Compatibility of membrane carbohydrates
and proteins
Speciation for 200
What is it called when the natural selection acting upon a species is
dependent upon another, distantly related species, and vice versa?
Coevolution
Speciation for 300
What are two ways to describe the situation when
different mating seasons within a population lead
to the formation of separate species?
Temporal isolation or a temporal barrier.
Systematics for 100
List all of the kingdoms recognized today.
Animalia
Plantae
Fungi
Protista
Bacteria (or Eubacteria)
Archaea (or Archaebacteria)
Systematics for 200
Humans have binocular vision. Name a taxon in which this is an
ancestral character and another taxon in which this is a derived
character.
Ancestral = Homo sapiens, Homo, Hominidae, Primates
Derived = Eukarya, Animalia, Chordata, Mammalia
Systematics for 300
If given the rate of mutation of DNA and the
generation time, what can be determined about
two related groups of orgs?
Their point of divergence
Potpourri for 100
In which type of postzygotic isolation
might descendants of hybrids
significant health problems?
Hybrid breakdown
Potpourri for 200
If 16% of individuals in a population show the
recessive phenotype, find q, p, q2, p2, and 2pq.
q = .4
p = .6
q2 = .16
p2 = .36
2pq = .48
Potpourri for 300
What mechanism of evolution is at work in each scenario?
a)
b)
c)
An avalanche in Switzerland leaves only 5% of a remote village’s
population alive
A woman smoking leads to the abnormal formation of the spleen of her
child born 10 years later
The pilgrims carried only a small percentage of their homeland
population’s traits to the New World
a) Genetic drift – bottleneck effect
b) Mutation
c) Genetic drift – founder effect
To which family do we belong?
Hominidae