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MONDAY:Who are my parents and why?Answer on green do-now log.
Oct. 10th 2011
Welcome 7th GradersMr.
Martell 506
Mom?
Dad?
You need:Composition Book4 HandoutsQwizdom Remote (off)
1 2 3
1 2 3
Offspring
Oct. 10th 2011
Today’s ScheduleMr.
Martell 506
1. Do-Now
2. Recap of last week
3. Reading on inheritance
4. Define Genotype, Phenotype,
Dominant, and Recessive
5. Exit Ticket Quiz
DNA poster due Wed/Thur
Homework is due Friday
Dark MatterEssential Questions
What creates diversity among offspring?
Oct. 10th 2011
ReadingMr.
Martell 506
1. Individually read the paper and answer the questions on the front and back.
2. Compare your answers with you’re the person sitting at your table
3. Generate definitions for the 4 words below and write them in your composition book on page 2-6.1. Genotype2. Phenotype3. Dominant trait/allele4. Recessive trait/allele
Oct. 10th 2011
ReadingMr.
Martell 506
R r rR
Dominant Allele: No running (R)Recessive Allele: Running (r)
r rR R R r
or
Oct. 10th 2011
Vocabulary Mr.
Martell 506
Dominant Trait
A trait that is able to mask or cover the affects a recessive gene
Rr
Oct. 10th 2011
Vocabulary Mr.
Martell 506
Recessive Trait
A trait that is only expressed when two copies are present.
Rr
Oct. 10th 2011
Vocabulary Mr.
Martell 506
Phenotype
An organism’s observable characteristics or traits
Oct. 10th 2011
Vocabulary Mr.
Martell 506
Genotype
BbDominant alleleRecessive allele
Oct. 10th 2011
Exit Ticket Mr.
Martell 506
Question 1:
The allele for freckles is (F), while the allele is for no freckles is (f). Using this information, you can infer that…
A) No freckles is a dominant traitB) Freckles is a dominant traitC) People with the ff genotype
will show frecklesD) People with the Ff will show
freckles
Oct. 10th 2011
Exit Ticket Mr.
Martell 506
Question 2:
The allele for freckles is (F), while the allele is for no freckles is (f). What is the phenotype for person with the genotype, Ff.
A) No frecklesB) FFC) FrecklesD) Ff
Oct. 11 & 12th
2011
Welcome 7th GradersMr.
Martell 506
Given the phenotype of the fruit fly, predict the fly’s possible genotypes:
Phenotype: Curly wings, white eyes, tan body.
Genotype: ?Dominant Recessive
Wings A = curly a=straightEye Color R = red r = whiteBody Color B = tan b = yellow
Oct. 10th 2011
Today’s ScheduleMr.
Martell 506
1. Do-Now
2. Define homozygous, heterozygous, and allele
3. Investigation
4. Exit ticket
Homework and Poster is due Friday
Dark Matter
Essential Questions
What creates diversity among offspring?
How are the structures in genetics related?
Oct. 11 & 12th
2011
Homozygous vs. Heterozygous Mr.
Martell 506
Phenotype: Curly wings, white eyes, tan body.
Possible Genotype:
AA, rr, BB
AA, rr, Bb
Aa, rr, BB
Aa, rr, Bb
Dominant Recessive
Wings A = curly a=straight
Eye Color R = red r = white
Body Color B = tan b = yellow
How is this genotype different than the others?
Oct. 11 & 12th
2011
Homozygous vs. Heterozygous Mr.
Martell 506
Allele: a version of one geneExample: curly wing allele = AExample: straight wing allele = a
Homozygous: having identical alleles or versions of a gene for a traitExample: Homozygous Dominant (AA)Example: Homozygous Recessive (aa)
Heterozygous: having different alleles or versions of a gene for a traitExample: Heterozygous (Aa)
“Homo” = Same
“Hetero” = Different
Oct. 11 & 12th
2011
Homozygous vs. Heterozygous Mr.
Martell 506
Review the handout from yesterday and classify each genotypes as….
1) Homozygous dominant2) Homozygous recessive3) Heterozygous
Oct. 11 & 12th
2011
InvestigationMr.
Martell 506
Pg 2-7 Pg 2-8
1. Glue the investigation handouts into your composition book. 2. Read introduction and answer pre-lab questions
Oct. 11 & 12th
2011
Investigation: Sexual ReproductionMr.
Martell 506
1. Each partner will get a nucleus (plastic cup) with two chromosomes (popsicle sticks).
2. Close your eyes and randomly pick one chromosome to pass down to your offspring.
3. Record the genotype and phenotype on your handout.
4. Add the traits to your fruit fly cut out and place on wall next to similar flies.
5. Repeat until you have data for 4 offspring
MaleNucleus
Chromosomes
FemaleNucleus
OffspringNucleus
Oct. 11 & 12th
2011
Investigation: Asexual ReproductionMr.
Martell 506
1. Close your eyes and select both chromosomes from the female’s nucleus and place them in the offspring nucleus.
3. Record the genotype and phenotype on your handout.
4. Add the traits to your fruit fly cut out and place on wall next to similar flies.
5. Repeat until you have data for 2 offspring
FemaleNucleus
OffspringNucleus
Oct. 11 & 12th
2011
Investigation: ConclusionMr.
Martell 506
Pg 2-9
Answer the questions below using complete sentences.
1) Compare the offspring made by sexual reproduction and asexual reproduction.
2) Explain why the offspring made by sexual reproduction differ from asexual reproduction.
3) Imagine a virus infects both populations of offspring and kills only red eyed flies. Which population of offspring is most likely to survive: the population of sexually or asexually reproducing flies? Explain your answer.
Conclusion Questions
Oct. 11 & 12th
2011
BrainPop: Asexual ReproductionMr.
Martell 506