Download 3.1 Intro to Genetics

Intro to Genetics

Catalyst:
 What
is the function of the ribosome? What
are proteins used for?
 Aaron thinks that drinking Rockstar will keep
him awake longer than water. So he
measures how long each keeps him awake.
Identify the independent and dependent
variable.
Write in complete sentences!
Don’t talk during the Catalyst!
Intro to Genetics
By the end of today, SWBAT…
Define the essential terms of
genetics
Differentiate between
genotype and phenotype
Agenda – JAM PACKED WITH FUN!
Catalyst Review
 Biology Resume
 Genes
 Alleles
 Genotype/Phenotype
 Practice (Yes, we talkin’ bout practice!)
 Exit Question

Catalyst Review
What is the function of the ribosome?
What are proteins used for?
 Aaron thinks that drinking Rockstar will
keep him awake longer than water.
Identify the independent and
dependent variable.

What is a GLE?

GLE = Grade Level Expectation
These
are the “topics” or “objectives” for
every class you’ve ever taken
The State of Louisiana comes up with
these
Biology has 52 GLEs
Why am I telling you this?
To empower you with your own
education
In this class you will track (or
monitor) your own progress of
mastering (or becoming an
expert in) these GLEs.

Tracking

You have exactly (NO MORE, NO LESS) 12 minutes
to fill out your resume. It should go quick. If you
finish early, start test corrections.
 Write
out question
 Write out correct answer!
 Write out why it is correct.

When the timer rings, I expect your tables to be
cleared of your tests and all resume turned into the
group folder.
What would this
celebrity baby look
like???
+
= ???
If these two had a baby…
It would look like this.
+
= ???
If they had a baby…
It would look like this.
+
= ???
Where are we going with this?

By the end of this unit, you will understand how
we inherit traits from our parents
 If
your mother has blue eyes and your father has
brown eyes, can you predict if their child will have
blue or brown eyes? Can you calculate it?
 You
will create your own mythical creature with its
own traits and show its possible offspring.
GENETICS

Key Point #1:
 Organisms
inherit genes from their
parents.
 Genes
are pieces of DNA that you inherit
from your parents. ONE gene instructs the
cell how to make ONE protein.
Check out my beads… dawg.

What does this necklace represent?
A

What does just one long piece of this necklace
represent?
A

chromosome.
gene.
What is each bead?
 DNA.
Chromosome
Gene
DNA
Check out my picture… dawg
Wait a second…



Can you roll your tongue?
How come some of you can roll your tongue and
some of you can’t?
BECAUSE GENES CAN BE DIFFERENT! They come in
different flavors…. called
Alleles

Key Point #2: All living organisms
have two alleles for every gene.
 Alleles
are different versions of genes.
 You get one allele from mom and one allele
from dad.
 There are two flavors— dominant and
recessive.
 More
on dominant and recessive tomorrow.
Alleles and Traits


A trait is a characteristic of an organism. Eye
color, hair color, tongue rolling, ear lobes free
or attached, etc.
Remember, a gene determines a trait:
 Genes

for eye color, tongue rolling, etc.
An allele is a version of the trait:
 Brown
or blue eyes. Can roll or cannot roll tongue.
Genotype

Key Point #3: Genotype is the combination
of alleles inherited from the parents.
Phenotype is the physical expression of
those alleles.
 Ex.
Eye color genotype:
 Ee,
 Ex.
EE, ee
Eye color phenotype:
 Brown
Eyes, blue eyes, green eyes
Easy way to remember
GENotype
 “GENe”
PHenotype
 “PHysical characteristics”

Guided Practice

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
AA
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
AA
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Brown Eyes
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Brown Eyes
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

Is this a genotype or phenotype???
A) Genotype
B) Phenotype
Guided Practice (GP)

What is the difference between a gene and an
allele?
Guided Practice (GP)

What are the two different types of alleles?

How do you represent them?
Guided Practice (GP)

Order gene, chromosome, DNA in order of biggest
to smallest.
Independent Practice (IP)
Key Point Wrap-Up

Key Point #1: Organisms inherit GENES from
their parents.
 ONE
gene instructs the cell how to make ONE
protein.

Key Point #2: All living organisms have two
alleles for every gene.
 Alleles

are different flavors (versions) of genes.
Key Point #3: Genotype is the combination of
alleles inherited from the parents. Phenotype is
the physical expression of those alleles.
Exit Question
D.D. has black hair. Is this an
example of a genotype or
phenotype?
How do you know?

Write in complete sentences!
Don’t talk during the Exit Question!