Transcript Potato Head Genetics Gina Ford & Jennifer Hladun Twelve

Potato Head Genetics
Gina Ford & Jennifer Hladun
Twelve Bridges Middle School – Lincoln, California
Overview
~Cumulative Assessment Project
– Assignment Points
(C – cooperatively with classmate)
– Assessment Points
(I – Individual application)
~3 Generations of Potato Heads
– “Parent” Chromosomes of Mr. and Ms. Potato Head
– Mr. & Ms. Potato Head
– Spud/Spudette
~ 4-5 days in length
Background Knowledge
~DNA
~Patterns of Inheritance
~Punnett Squares
~Genes on Chromosomes
~Karyotype
~Dominant
~Recessive
~Genotype
~Phenotype
7th Grade Genetic Standards
2 - A typical cell of any organism contains genetic instructions that specify its
traits.
2b – Sexual Reproduction produces offspring that inherit half their genes from
each parent
2d – Students know plant and animal cells contain many thousands of
different genes and typically have two copies of every gene. The two
copies (or alleles) of the gene may or may not be identical, and one may
be dominant in determining the phenotype while the other is recessive.
2e- DNA (deoxyribonucleic acid) is the genetic material of living organisms
and is located in the chromosomes of each cell
Let’s Get Started
1. Bag full of supplies (scissors, pencil,
color pencils, glue, hair, sex cells, 7
envelopes with chromosomes, empty
baggie, laminated potato head pieces
list)
2. Mr. Potato Head Silly Suitcase
3. Construction paper folder – for today’s
short course
4. Folder of blackline masters.
*Electronic copies can be found on our website-addresses
are in your blackline masters folder
Please take out
1. All items out of your bag full of supplies
(scissors, pencil, color pencils, glue, hair,
sex cells, 7 envelopes with
chromosomes, empty baggie, laminated
potato head pieces list)
2. Open your Mr. Potato Head suitcase
(need scissors)
3. Using your laminated potato head pieces
list – add all of those items into your
empty plastic baggie (everything your are
not using goes back into your silly
suitcase)
Mr. Potato Head (C)
1. Pull “parent” chromosomes
(one male and one female from each
envelope)
2. Record inherited alleles in genotype
column
3. Correctly return “parent” chromosomes
4. Using the table, record the phenotype for
each of Mr. Potato’s genotypes
5. Construct Mr. Potato Head
6. Draw Mr. Potato Head’s with his
inherited traits on your worksheet
Ms. Potato Head (C)
1. Pull “parent” chromosomes
(one male and one female from each
envelope)
2. Record inherited alleles in genotype
column
3. Correctly return “parent” chromosomes
4. Using the table, record the phenotype for
each of Ms. Potato’s genotypes
5. Construct Ms. Potato Head
6. Draw Ms. Potato Head’s with her
inherited traits on your worksheet
Punnett Squares (I)
1. Using your Mr.(blue) and Ms. (pink) completed
worksheets, add the correct genotype for each
trait to the correct punnett square
2. Complete each punnett square and the
probability data for the offspring.
3. In the marked punnett square box, color code
which allele came from Ms. Potato head (pink)
and which allele came for Mr. potato head
(blue)
4. Circle which phenotype your offspring will have
(use marked punnett square) on your
probability data boxes
Spud/Spudette (I)
1. Using the marked box on your punnett
square record your spud/spudette’s
genotype and phenotype on the
worksheet
2. Double check your work. Fix any errors!
**Make sure you record the correct
phenotype for Hat/Hair depending on if
your offspring is male/female
3. Draw in your baby spud/spudette’s
inherited traits on the worksheet.
Sex Cells (I)
**you can do this before spud/spudette, but
we find they lose the sex cells before
they glue them on their poster
1. Using your punnett square worksheet, fill
in the male sex cell with the alleles Mr.
Potato head passed on to his offspring.
2. Using the same process, fill in the female
sex cell with the alleles Ms. Potato head
passed on to her offspring.
Poster (I)
1. Carefully cut out Mr. Potato, Ms. Potato,
and baby spud/spudette along with their
genetic information (gentoype/phenotype
chart)
2. Glue mom, dad and baby spud/spudette
down on your poster. Make sure the
chart is with the correct potato!
3. Glue the sex cells next to your baby
spud/spudette
4. Add family name (The____Family)
5. Add first names for all 3 members of your
potato family
Written Summary (I)
• Complete using the word bank
• Double check your answers/READ your
summary before turning it in!
Written Assessment (I)
• Complete 4 questions
• Grading
#1 – 2 pts (what/why)
#2 – 4 pts (1/2 point per allele pair)
#3 – 2 pts (what/why)
#4 – 2 pts (application – drawing connections)
*We also included a copy of a grading rubric in
your blackline masters folder.
Feedback/Wrap Up
On the blank mini potato heads…
• Please take a moment to provide us with
any feedback or questions you may have.
– If you would like a response to your question,
please include your email address and we will
contact you as soon as we can with an
answer.
Contact Information
~Thank you for attending our presentation.
~You can find the powerpoint and all of the handouts
on our websites.
~Please contact us with any questions and/or new
ideas.
Gina Ford - [email protected]
http://tbms.wpusd.k12.ca.us/subsites/Gina-Ford/
Jennifer Hladun - [email protected]
http://tbms.wpusd.k12.ca.us/subsites/Jennifer-Hladun