Download 20170303 Weekly Biology - Steilacoom School District

BIOLOGY
Monday
27 Feb 2017
Entry Task
Explain the two significant patterns of biogeography used by
Darwin as evidence for evolution.
• Closely related but different - organisms differentiate in
slightly different environments.
• Distantly related but similar - organisms developed similar
adaptations in similar environments.
Agenda
 Housekeeping
 Genetics as evidence
 NOVA - The Evolution Lab
Housekeeping
Cell phone policy.
• Posted on the wall.
Chpt 16 & 17 scheduled for 9 Mar.
• Kahoot review on Wednesday, 8 Mar.
Genetics
Genetics & Molecular Biology:
• Universal genetic code & homologous molecules provide
evidence of common descent.
• Life’s Common Genetic Code - nearly identical in all
organisms.
• Homologous Molecules - proteins that are similar in structure
& function.
p. 470-471
NOVA Evolution Lab
NOVA - The Evolution Lab
• Grab a computer & log in.
• Grab one NOVA Evolution Lab workbook & pass the
remainder back.
• Wait for further instructions.
Note: The NOVA Evolution Lab workbook can be located @
http://www.steilacoom.k12.wa.us/Page/5716
NOVA Evolution Lab
NOVA - The Evolution Lab
• Create a PBS account (required to save progress)
• Link: https://account.pbs.org/accounts/login/
NOVA Evolution Lab
NOVA - The Evolution Lab
Link:
http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo
ser
NOVA Evolution Lab
NOVA - The Evolution Lab
• You will need to first log out of the guest user & log in using
the log in you created.
• We will watch the introduction video as a class & you will
answer the introduction questions in your workbook.
BIOLOGY
Tuesday
28 Feb 2017
Entry Task
Grab a computer & log-in.
Google “nova evolution” & log-in to continue lab.
Agenda
 Housekeeping
 NOVA - The Evolution Lab
Housekeeping
Interested in retaking Exam 7 Chpt 11?
Progress reports will be emailed Monday, 6 Mar.
• Quarter ends Friday, 31 Mar.
Chpt 16 & 17 scheduled for 9 Mar.
• Kahoot review on Wednesday, 8 Mar.
Teacher training day scheduled for Friday, 10 Mar.
• “No School”
NOVA Evolution Lab
NOVA - The Evolution Lab
Link:
http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo
ser
BIOLOGY
Wednesday
1 Mar 2017
Entry Task
Explain genotype & phenotype.
• Genotype = the genetic makeup of an organisms trait.
• Phenotype = the physical or observable characteristic of an
organisms trait.
Agenda
 Housekeeping
 Chapter 17 Vocabulary
 Chapter 17 Workbook
Housekeeping
Progress reports will be emailed Monday, 6 Mar.
• Quarter ends Friday, 31 Mar.
Chpt 16 & 17 scheduled for 9 Mar.
• Kahoot review on Wednesday, 8 Mar.
Teacher training day scheduled for Friday, 10 Mar.
• “No School”
Chpt 17 Vocabulary
Vocabulary to be checked today.
• Note: Chpt 17 vocabulary foldable can be located @
http://www.steilacoom.k12.wa.us/Page/5716
Chpt 17 Workbook
Complete the chpt 17 workbook:
• Will be collected Friday, 3 Mar.
• Note: Chpt 17 workbook can be located @
http://www.steilacoom.k12.wa.us/Page/5716
BIOLOGY
Thursday
2 Mar 2017
Entry Task
How many organisms in the
population below?
• 35 individuals
What is the number of dominant
(blk on blk) alleles?
• 38 alleles
What is the frequency of
recessive alleles?
• 45 percent
22 22
10
16
Agenda
 Housekeeping
 Genes & Variations
Housekeeping
Progress reports will be emailed Monday, 6 Mar.
• Quarter ends Friday, 31 Mar.
Chpt 16 & 17 scheduled for 9 Mar.
• Kahoot review on Wednesday, 8 Mar.
Teacher training day scheduled for Friday, 10 Mar.
• “No School”
Genes & Variations
Genotype:
• Genetic makeup; combination of alleles (ex: Bb, Rr).
• Cannot be seen.
Phenotype:
• Physical, physiological, & behavioral characteristics of an
organism (ex: brown fur, red petals).
• Can be seen.
p. 482-483
Genes & Variations
Populations:
• Group of individuals of the same species that mate & produce
offspring.
Gene Pool:
• All the genes, including
different alleles, present
in a population.
p. 483
Genes & Variations
Allele Frequency:
• The number of times an allele occurs in a gene pool.
p. 483
Frequency Worksheet
Grab one and pass it back.
Instructions are on the worksheet.
BIOLOGY
Friday
3 Mar 2017
Entry Task
Complete your “Natural Selection & Allele Frequency”
worksheet.
• When answering the questions you must use complete
sentences.
Agenda
 Housekeeping
 Genes & Variations
Housekeeping
Progress reports will be emailed Monday, 6 Mar.
• Quarter ends Friday, 31 Mar.
Chpt 16 & 17 scheduled for 9 Mar.
• Kahoot review on Wednesday, 8 Mar.
Teacher training day scheduled for Friday, 10 Mar.
• “No School”
Sources of Variations
Mutations
• Change in the genetic material.
• Some may lower fitness (ability to survive & reproduce) & still
others may increase fitness.
• How common? Each of us is born with roughly 300 mutations.
p. 484
Sources of Variations
Genetic Recombination in Sexual Reproduction:
• Independent assortment during meiosis.
• 23 pairs of chromosomes = 8.4 million gene combinations.
• Crossing-over further increases the number of new
genotypes.
Lateral Gene Transfer:
• Exchanging of genes from one organism to another.
• Can be of the same species or different species.
• Occurs in single-celled organisms (important in the evolution
of antibiotic resistant bacteria).
p. 484-485
Traits
Single Gene Traits
• Traits controlled by only one
gene.
Polygenic Traits
• Traits controlled by two or more
genes.
p. 485-486
Natural Selection
Single Gene Traits:
• Can lead to changes in allele frequencies.
• Leads to changes in phenotype frequency.
p. 488
Natural Selection
Polygenic Traits:
• Affects the relative fitness of phenotypes.
Produces one of three types of selection:
• Directional Selection
• Stabilizing Selection
• Disruptive Selection
p. 488
Natural Selection
Group activity:
• Identify a member to read each of the four areas of Natural
Selection & Polygenic Traits & one to read Genetic Drift.
• You will read your assigned section.
• You will then share your information with your group.
p. 489-490