JeopardyJeopardy

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Gregor Mendel

Punnett Squares &Probability

Patterns ofInheritance 1

Patterns of Inheritance 2

Pedigrees

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Final JeopardyFinal Jeopardy

1 - $1001 - $100

Mendel’s rule stating that and organism possesses 2 genes for every trait.

What is the rule of Unit Factors?

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Organisms have 2 alleles for every trait. Their gametes have only 1. Which of Mendel’s principles best illustrates this fact?

What is the Law of Segregation?

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List 3 reasons Mendel’s choice to work with pea plants was a good one.

Can self pollinate, Traits with 2 distinct phenotypes, Small & Reproduce quickly

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How are the principles of segregation and independent assortment related?

Allele pairs segregate from one another at gamete production. This occurs for each gene, independently of other genes.

1 - $5001 - $500 Diploid cells of the fruit fly Drosophila melanogaster have 8

chromosomes. How many chromosomes would you find in How many chromosomes would you find in the following fruit fly cells: the following fruit fly cells: – Sperm cellSperm cell– Muscle cellMuscle cell– Brain cellBrain cell

Sperm: 4 (gamete) Muscle: 8 Brain: 8

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What is the predicted phenotypic ration for the cross below?

Rr x Rr, where R = round seeds and r = wrinkled seeds

3:1

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In pea plants, tall is the dominant height allele. Design a test cross to determine the genotype of a tall pea plant.

What results would you expect if the parent were homozygous? Heterozygous?

What is cross the tall plant with a homozygous recessive (short) plant.All tall offspring parent was homozygous tall½ tall offspring parent was heterozygous tall.

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List all possible gametes that could be made by a parent with the genotype AaBBCc

Gametes (1of each gene):

ABC, ABc, aBC, aBc

2 - $4002 - $400 A cross between a tall and a short pea plant

results in the following offspring: 52 tall, 55 short

What are the most likely genotypes of the parent plants? Explain using a Punnett square.

A homozygous short plant (recessive) crossed with a heterozygous tall plant.

T t

t

t

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Set up a Punnett square to show a cross between the following parents:

TtPPYY x TTPpYy

TPY TPy TpY TpyTPY

tPY

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What is a polygenic trait? Give an example.

A trait controlled by more than 1 gene. Examples: height, skin color, eye color

3 - $2003 - $200 Differentiate between the following

terms:

Gene, allele, chromosome. Alleles are distinct forms of a gene.

Genes are segments of chromosomes that code for proteins (traits).

Chromosomes are long strands of DNA, containing many genes.

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If a heterozygous individual has a trait that is not shared with either parent, that trait is referred to as …

Incompletely Dominant

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A mother with type O blood and a father with AB could produce these offspring.

What are A and B?

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What is the predicted phenotypic ratio of offspring that would result from the following cross:

AaBb x AaBbAaBb x AaBb*Note: A and B are dominant over a and b respectively.*Note: A and B are dominant over a and b respectively.

9:3:3:1

4 - $1004 - $100Answer any 4 of the following: In which US state could you visit 1> the Space Needle? 2> the Valley Forge National Historic Park? 3> the Mark Twain House? 4> the Okefenokee Swamp? 5> the Lincoln Log Cabin? 6> the Yellowstone National Park? 7> the Portage Glacier? 8> Cripple Creek? 9> the U.S. Naval Academy Annapolis?

1> Washington 2> Pennsylvania 3> Connecticut 4> Georgia 5> Indiana 6> Wyoming 7>Alaska 8> Colorado 9> Maryland

4 - $2004 - $200 In Laborador retrievers, coat color is controlled by two In Laborador retrievers, coat color is controlled by two

genes. Black coat color (B) is dominant to brown coat genes. Black coat color (B) is dominant to brown coat color (b). However, dogs that are homozygous color (b). However, dogs that are homozygous recessive at another unlinked gene (e) are yellow. recessive at another unlinked gene (e) are yellow. What is the name for this type of inheritance? What is the name for this type of inheritance?

EpistasisEpistasis

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Because the sickle-cell gene affects more Because the sickle-cell gene affects more than one phenotypic trait in affected than one phenotypic trait in affected individuals, it is an example of individuals, it is an example of _____________._____________.

PleiotropyPleiotropy

4 - $4004 - $400 If a female fruit fly homozygous for red eyes is crossed with If a female fruit fly homozygous for red eyes is crossed with

a white eyed male, what percentage of the offspring would a white eyed male, what percentage of the offspring would have white eyes? have white eyes?

If two of the F1 offspring from question 4 were crossed, If two of the F1 offspring from question 4 were crossed, what percentage of the F2 generation would have white what percentage of the F2 generation would have white eyes?eyes?

F1: 100% RedF1: 100% Red F2: 25% White eyes. (No females, ½ of males)F2: 25% White eyes. (No females, ½ of males)

4 - $5004 - $500 A certain species of moth may have antennae that are A certain species of moth may have antennae that are

feathery or non-feathery. Those with non-feathery feathery or non-feathery. Those with non-feathery antennae usually have white eyes. Antennae type and antennae usually have white eyes. Antennae type and color are each controlled by a single pair of genes. color are each controlled by a single pair of genes. Suggest a valid conclusion that can be drawn regarding Suggest a valid conclusion that can be drawn regarding these genes.these genes.

The 2 genes are linked – found on the The 2 genes are linked – found on the same chromosomesame chromosome

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Draw a pedigree showing a man and a Draw a pedigree showing a man and a woman marrying and having 5 children, 2 woman marrying and having 5 children, 2 identical twin girls and 3 boys.identical twin girls and 3 boys.

5 - $2005 - $200 Name the bands that released any 4 of the following albums:Name the bands that released any 4 of the following albums:1> Peace Sells... But Who's Buying? 1> Peace Sells... But Who's Buying?

2> No Fences 2> No Fences

3> My World 3> My World

4> Pretty Hate Machine 4> Pretty Hate Machine

5> Hybrid Theory 5> Hybrid Theory

6> The Chronic 6> The Chronic

7> Elephunk 7> Elephunk

8> Don't Rock the Jukebox 8> Don't Rock the Jukebox

9> Dark Side of the Moon 9> Dark Side of the Moon

10> Music for the Masses10> Music for the Masses

1> Megadeth, 2> Garth Brooks, 3> Justin Bieber, 4> Nine Inch Nails, 5> Linkin Park, 1> Megadeth, 2> Garth Brooks, 3> Justin Bieber, 4> Nine Inch Nails, 5> Linkin Park, 6> Dr. Dre, 7> Black Eyed Peas, 8> Alan Jackson, 9> Pink Floyd, 10> Depeche Mode 6> Dr. Dre, 7> Black Eyed Peas, 8> Alan Jackson, 9> Pink Floyd, 10> Depeche Mode

5 - $3005 - $300 The pedigree chart below shows the pattern of The pedigree chart below shows the pattern of

inheritance for a sex-linked trait. If this couple inheritance for a sex-linked trait. If this couple has another son, what is the probability that has another son, what is the probability that he will exhibit this sex-linked trait?he will exhibit this sex-linked trait?

50%50%

5 - $4005 - $400 What type of in heritance is most likely

represented by the Pedigree below?

What is X-linked recessive?

5 - $5005 - $500 Identify all known carriers in the chart below.Identify all known carriers in the chart below.

IIA, IIB, IIIC, IIID, IVA-B, IVD-FIIA, IIB, IIIC, IIID, IVA-B, IVD-F

I

II

III

IV

A B

Final JeopardyFinal Jeopardy

The gene for hairy-rimmed ears is on the Y chromosome. Predict the inheritance pattern for hairy rimmed ears.– Who gets it?

– From whom?

– How often?

What is only seen in males and always passes from father to son?