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 chromosome.

What does just one long piece of this necklace represent? A 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, EE, ee Ex. 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???

AAA) Genotype

B) Phenotype

Guided Practice (GP)

Is this a genotype or phenotype???

AAA) Genotype

B) Phenotype

Guided Practice (GP)

Is this a genotype or phenotype???

Brown EyesA) Genotype

B) Phenotype

Guided Practice (GP)

Is this a genotype or phenotype???

Brown EyesA) 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)

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!