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Copy the schedule in your p lanners. Monday December 10 Remember to hand in homework (the one with the guinea pigs). Do Now: A poodle has Pp for a certain trait. Will the dominant or recessive trait show up and how do you know? - PowerPoint PPT PresentationTRANSCRIPT
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Copy the schedule in your plannersMonday Tuesday/Wednesday Thursday/Friday
Punnett Square and vocab review, Traits and Traditions, Stations
Notes on genotype, phenotype, and codominance; SpongeBob genetics worksheet #1; exit slip
Homework: Creature Genotype and Phenotype Practice
Heredity article, vocab practice, Create a Creature
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Monday December 10Remember to hand in homework (the one with
the guinea pigs)Do Now:1. A poodle has Pp for a certain trait. Will the
dominant or recessive trait show up and how do you know?
2. A Gg spider was crossed with a GG spider. What is the percent chance of having a hybrid?
Date Table of Contents Page12-10-12 Traits Vs. Traditions
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Class Points
• 1st hour: 117 ***• 2nd hour: 80• 3rd hour: 132 ***• 4th hour: 109 ***• 6th hour: 100 ***• 7th hour: 106 ***
BTW: If you have any homework from last week that you didn’t hand in, HAND IT IN THIS WEEK!!!
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Today’s Plan
• Review Punnett Squares and genetics vocabulary
• Learn about the chances to have a boy or a girl• Take notes on traits and traditions• Genetics Stations
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Review
• What is the difference between dominant and recessive?
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Review• Which of the allele combinations below are considered purebreds?
BB
Bb
ss
Xy
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Review
• If a purebred dominant (RR) is crossed with a purebred recessive (rr), what are the chances that they will have a purebred recessive (rr)?
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Review
• What is an allele?
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Review
• If the dominant trait is curly hair and the recessive trait is straight hair, how likely is it that two hybrids (Ee) can have offspring with straight hair?
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New Info
• Please write the information in red and the information your teacher asks you to write.
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Chances for Boys and Girls
• How likely is it that a baby will be a boy or a girl?– Males have XY alleles.– Females have XX alleles.
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• The male can either give an X or a Y (because he has XY).
• The female can only give an X (because she has XX).
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• Use a Punnett Square to find the percent chance of having a boy or a girl.
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Results
• What percent of the babies will be girls?– 50% chance for boys (XY)
• What percent of the babies will be boys?– 50% chance for girls (XX)
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Traits Vs. Traditions
• Traits can be inherited from a parent, or traits can be learned.
• Family and cultural traditions often influence learned traits.
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• What traits have you inherited? • What traits have you learned?
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Traits that were passed genetically:
• Attached earlobes• Brown eyes• Curly hair• Nearsighted vision• Tallness
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Traits that were learned (traditions):
• Liking spicy foods• Enjoying drawing• Being able to write in cursive• Riding a bike
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Copy the traits
• Pierced ears• Rolling tongue• Liking Italian food• Thinking thin people are pretty• Having naturally brown hair• Being able to spiral a football• Having allergies• Having a funny laugh
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• Pierced ears• Rolling tongue• Liking Italian food• Thinking thin people are pretty• Having naturally brown hair• Being able to spiral a football• Having allergies• Having a funny laugh
Underline the traits you get genetically.
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The traits you get genetically are underlined.
• Pierced ears• Rolling tongue• Liking Italian food• Thinking thin people are pretty• Having naturally brown hair• Being able to spiral a football• Having allergies• Having a funny laugh
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Stations• Write your name, date, and hour on a piece of
notebook paper and number it to 20.
• Station rules:– Go to as many stations as possible in the time
remaining.– No more than 2 people at any station.– You can work by yourself or with one partner.– You can check your answers no more than 3 times.
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Tuesday Dec 11 or Wednesday Dec 12Do Now:1. In sentences explain why approximately half of all
babies born are boys.2. Do you think you can have a blend of your parents’
traits? Why or why not?3. Give an example of a learned trait that we did not
talk about last time. Explain how you know it is a learned trait.
Date Table of Contents Page
12-11-12Or12-12-12
Genotype, Phenotype, and Codominance
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Today’s Plan
• Take notes on genotype, phenotype, and codominance
• SpongeBob genetics worksheet• Exit Slip about what we’ve learned about
genetics so far• Work on homework if there is any time
remaining (yes we have homework today)
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Notes
• Write down all of the information in red and any thing your teacher asks you to copy down.
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• A genotype is the allele combination of an organism or its genetic makeup.– Genotype has to do with the letters.
RR
BB
Gg
vv
XY
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• A phenotype is an organism’s physical appearance or the traits it has. – It usually has to do with how something looks.
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• Using this picture, explain the difference between genotype and phenotype in your own words.
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• Geno/Pheno Example:– Plants that were tall in Mendel’s experiment could
be TT or Tt.• These two plants have the same
phenotype because they are both tall (so they look the same).• These plants have a different genotype
because one has TT and the other has Tt.
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• Is nose size a genotype or a phenotype? How do you know?
• Is RR a genotype or a phenotype? How do you know?
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Homozygous and Heterozygous
• Predict what you think the difference is between homozygous and heterozygous. – Hint: use what you know about homogenous and
heterogeneous mixtures to help you.
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Homozygous and Heterozygous • Revise your prediction by using the
information in the diagram below.
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• Remember that the prefix homo means the “same.” The prefix hetero means “different.”
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• Homozygous is an organism that has two of the same alleles for a trait.– Example: TT or tt– Homozygous is the same as purebred.
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• Heterozygous is an organism that has two different alleles for a trait.– Example: Tt– Heterozygous is the same as a hybrid.
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• Is Ee homozygous or heterozygous and how do you know?
• Is YY homozygous or heterozygous and how do you know?
• Is bb homozygous or heterozygous and how do you know?
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• What is another name for homozygous?
• What is another name for hybrid?
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• For all of the traits in the pea plants, one trait was dominant and one trait was recessive. However, this is not always the case with genetics.
• Predict what you think codominance means.
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• In codominance the alleles are neither dominant nor recessive.– In codominance, both alleles are seen in the
offspring.
Can you still see parts of the duck? Can you still see parts of the beaver? Is this codominance?
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• In codominance, heterozygous organisms do not have one trait masked, but a mix of both traits.
• Can you think of any examples of codominance?– Example of codominance: a red rose is crossed
with a white rose and they make a pink rose.
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• Explain the meaning of codominance in your own words using the pictures below.
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Review • What is genotype?• Give an example of a genotype.• What is phenotype?• Give an example of a phenotype.• What is homozygous?• What is another word for homozygous?• What is heterozygous? • What is another word for heterozygous?• What is codominance?• Give an example of codominance.
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Add these words and their page numbers to your glossary.
• Genotype• Phenotype• Homozygous• Heterozygous• Codominance
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Complete the SpongeBob Genetics Sheet
• This worksheet is meant to challenge you. Here are some hints to be successful:– Use your lab book. This worksheet uses a LOT of
your new vocabulary words. If you don’t know what a word means, look it up
– Use your tablemates. Scientists often work together to make discoveries.
– Trial and Error. It’s okay to make mistakes, just make sure to work towards a greater understanding.
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Exit Slip• Make your notecard look like the one below.
Recall that labeling your note card correctly is worth one point.
First and Last Name Date Hour1. 2. 3.
4.
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• Remember that there is no talking during an exit slip. No talking AT ALL unless you raise your hand and the teacher comes to you.
• When you are finished, flip your notecard over and draw a cute or evil hamster on the back.
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Question 1.1. Which of the answers below
shows a homozygous allele pair?a) RRb) Ttc) mmd) Both answer A and answer C
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Question 2.2. In hamsters a dominant trait is for black eyes (H). A recessive trait is for red eyes (h). You have a hybrid hamster. What is his genotype?
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Question 3.3. In hamsters a dominant trait is for black eyes (H). A recessive trait is for red eyes (h). A hh hamster is crossed with a Hh hamster. Create and solve a Punnett Square to show their offspring.
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Question 4.4. Lisa’s father has straight hair. Her mother has curly hair. Lisa has wavy hair. Use what you know about genetics to write a sentence to explain how this is possible.
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Remember to complete your homework!!Creature Genotype and Phenotype Practice due next class period.
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Thursday Dec 13 or Friday Dec 14Remember to hand in Creature Genotype and Phenotype Practice!
Do Now:1. A white fish was crossed with a black fish. Their
offspring were white with black dots. What is this an example of and how can you tell?
2. What is the difference between genotype and phenotype?
Date Table of Contents Page12-13-12Or12-14-12
Create a Creature
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Today’s Plan
• Heredity Reading and Questions• Genetics Vocabulary Sort• Create a Creature
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Heredity Article
• Read the article out loud with your tablemates.
• Answer the questions in COMPLETE SENTENCES. If you don’t write in complete sentences you will not get full credit for this assignment.
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Vocabulary Sort• Place lab books on the floor.• With your tablemates, sort the vocabulary words to
match their definitions.• Raise your hands to have the teacher check your
answers. • Follow the directions on your worksheet to record
your information.• Repeat the sort to improve your score.• Record your information.• Have tablemates complete the sort individually and
record their information on the back of the sheet.
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Create a Creature
• Watch the demonstration carefully so you know how to create your own creature.
• Then work with your tablemates to make your creature.
• Then draw your creature.