biology monday 27 feb 2017 - steilacoom

BIOLOGY

Monday

27 Feb 2017

Entry TaskExplain 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

HousekeepingCell 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


• 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


• Create a PBS account (required to save progress)

• Link: https://account.pbs.org/accounts/login/

https://account.pbs.org/accounts/login/

NOVA Evolution Lab


Link:

http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo

ser

http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/chooser

NOVA 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 TaskGrab a computer & log-in.

Google “nova evolution” & log-in to continue lab.

Agenda Housekeeping


HousekeepingInterested in retaking Exam 7 Chpt 11?

Progress reports will be emailed Monday, 6 Mar.

• Quarter ends Friday, 31 Mar.



Teacher training day scheduled for Friday, 10 Mar.

• “No School”

NOVA Evolution Lab


Link:

http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/choo

ser

http://www.pbs.org/wgbh/nova/labs/lab/evolution/research#/chooser

BIOLOGY

Wednesday

1 Mar 2017

Entry TaskExplain 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

HousekeepingProgress reports will be emailed Monday, 6 Mar.





• “No School”

Chpt 17 Vocabulary

Vocabulary to be checked today.

• Note: Chpt 17 vocabulary foldable can be located @



Chpt 17 WorkbookComplete the chpt 17 workbook:

• Will be collected Friday, 3 Mar.

• Note: Chpt 17 workbook can be located @



BIOLOGY

Thursday

2 Mar 2017

Entry TaskHow 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






• “No School”

Genes & VariationsGenotype:

• 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 & VariationsPopulations:

• Group of individuals

offspring.

Gene Pool:

• All the genes, including

different alleles, present

in a population.

Populations:

• Group of individuals of the same species that mate & produce

offspring.

p. 483

Genes & VariationsAllele Frequency:

• The number of times an allele occurs in a gene pool.

p. 483

Frequency WorksheetGrab one and pass it back.

Instructions are on the worksheet.

BIOLOGY

Friday

3 Mar 2017

Entry TaskComplete your “Natural Selection & Allele Frequency”

worksheet.

• When answering the questions you must use complete

sentences.

Agenda Housekeeping

Genes & Variations






• “No School”

Sources of VariationsMutations

• 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 VariationsGenetic 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

TraitsSingle Gene Traits

• Traits controlled by only one

gene.

Polygenic Traits

• Traits controlled by two or more

genes.

p. 485-486

Natural SelectionSingle Gene Traits:

• Can lead to changes in allele frequencies.

• Leads to changes in phenotype frequency.

p. 488

Natural SelectionPolygenic Traits:

• Affects the relative fitness of phenotypes.

Produces one of three types of selection:

• Directional Selection

• Stabilizing Selection

• Disruptive Selection

p. 488

Natural SelectionGroup 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

biology monday 27 feb 2017 - steilacoom

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