Transcript Slide 1

Mr.
Martell
506
Welcome 7th Graders
You need:
Composition Book
4 Handouts
Qwizdom Remote (off)
2
1
Oct.
10th
2011
3
Mom?
MONDAY:
Who are my
parents and why?
Answer on green
do-now log.
Dad?
1
2
Offspring
3
Today’s Schedule
Mr.
Martell
506
Oct.
10th
2011
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
DarkEssential
Matter Questions
What creates diversity
among offspring?
Reading
Mr.
Martell
506
Oct.
10th
2011
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. Genotype
2. Phenotype
3. Dominant trait/allele
4. Recessive trait/allele
Mr.
Martell
506
Reading
Oct.
10th
2011
Dominant Allele: No running (R)
Recessive Allele: Running (r)
R r
r r
R r
R r
R R
or
Mr.
Martell
506
Vocabulary
Dominant Trait
A trait that is
able to mask or
cover the
affects a
recessive gene
R
r
Oct.
10th
2011
Mr.
Martell
506
Vocabulary
Recessive Trait
A trait that is
only expressed
when two copies
are present.
R
r
Oct.
10th
2011
Mr.
Martell
506
Vocabulary
Phenotype
An organism’s
observable
characteristics
or traits
Oct.
10th
2011
Mr.
Martell
506
Vocabulary
Oct.
10th
2011
Genotype
Bb
Recessive allele
Dominant allele
Exit Ticket
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 trait
B) Freckles is a dominant trait
C) People with the ff genotype
will show freckles
D) People with the Ff will show
freckles
Mr.
Martell
506
Oct.
10th
2011
Exit Ticket
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)
B)
C)
D)
No freckles
FF
Freckles
Ff
Mr.
Martell
506
Oct.
10th
2011
Welcome
7th
Mr.
Martell
506
Graders
Oct.
11 & 12th
2011
Given the phenotype of
the fruit fly, predict the
fly’s possible genotypes:
Phenotype: Curly wings,
white eyes, tan body.
Genotype: ?
Wings
Dominant
A = curly
Eye Color
R = red
Body Color B = tan
Recessive
a=straight
r = white
b = yellow
Today’s Schedule
Mr.
Martell
506
Oct.
10th
2011
1. Do-Now
2. Define homozygous,
heterozygous, and allele
3. Investigation
4. Exit ticket
Homework and Poster is due
Friday
Essential Questions
What creates diversity
Dark
Matter offspring?
among
How are the structures
in genetics related?
Mr.
Martell
506
Homozygous vs. Heterozygous
Phenotype:
Curly wings,
white eyes,
tan body.
Dominant
Recessive
Wings
A = curly
a=straight
Eye Color
R = red
r = white
Body Color B = tan
Oct.
11 & 12th
2011
b = yellow
Possible Genotype:
AA, rr, BB
AA, rr, Bb
Aa, rr, BB
Aa, rr, Bb
How is this genotype different than the others?
Homozygous vs. Heterozygous
Mr.
Martell
506
Oct.
11 & 12th
2011
Allele: a version of one gene
Example: curly wing allele = A
Example: straight wing allele = a
“Homo” = Same
Homozygous: having identical alleles or versions of a gene for a trait
Example: Homozygous Dominant (AA)
Example: Homozygous Recessive (aa)
“Hetero” = Different
Heterozygous: having different alleles or versions of a gene for a trait
Example: Heterozygous (Aa)
Homozygous vs. Heterozygous
Mr.
Martell
506
Review the handout from yesterday and classify each
genotypes as….
1) Homozygous dominant
2) Homozygous recessive
3) Heterozygous
Oct.
11 & 12th
2011
Mr.
Martell
506
Investigation
Oct.
11 & 12th
1. Glue the investigation handouts into your composition book.
2. Read introduction and answer pre-lab questions
Pg 2-7
Pg 2-8
2011
Investigation: Sexual Reproduction
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.
Mr.
Martell
506
Oct.
11 & 12th
2011
Chromosomes
Male
Nucleus
Female
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 4 offspring
Offspring
Nucleus
Investigation: Asexual Reproduction
Mr.
Martell
506
Oct.
11 & 12th
2011
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.
Female
Nucleus
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
Offspring
Nucleus
Investigation: Conclusion
Answer the questions below using complete
sentences.
Mr.
Martell
506
Oct.
11 & 12th
2011
Conclusion Questions
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.
Pg 2-9
BrainPop: Asexual Reproduction
Mr.
Martell
506
Oct.
11 & 12th
2011