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Genetics and Heredity
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MendelianGenetics
Non-Mendelian Genetics
Pedigrees Vocabulary
FINAL ROUND
Punnett Squares
Mendelian Genetics:
$100 Question
When a homozygous dominant genotype is crossed with a homozygous recessive genotype, what is the phenotypic ratio expected in the F2 generation?
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ANSWER
Mendelian Genetics :
$100 Answer
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3:1
Mendelian Genetics :
$200 Question
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In a dihybrid cross, a purebred dominant and a purebred recessive individual (they are purebred for both traits) are crossed. What is phenotypic ratio of the F2 generation?
Mendelian Genetics :
$200 Answer
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9:3:3:1
Mendelian Genetics :
$300 Question
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A ___________allele is one that is always expressed when that allele is present.
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dominant
Mendelian Genetics :
$400 Question
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What is Mendel’s Law of Segregation? Draw a diagram on the white board to illustrate this law.
Mendelian Genetics :
$400 Answer
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Alleles separate during gamete formation
Mendelian Genetics :
$500 Question
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What is the law of independent assortment? Draw a diagram to aid in the explanation.
Mendelian Genetics :
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Genes are separate chromosomes assort into gametes independently
Non-Mendelian:
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Which blood type is the universal donor? Why?
Non-Mendelian :
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Type O, it does not have any antigens on the surface of the red blood cells (they will not react with the antibodies in the other blood types)
Non-Mendelian :
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Skin color, eye color, and height in humans are examples of these type of traits that cause a bell shaped curve set of phenotypes
Non-Mendelian :
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polygenic
Non-Mendelian :
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This type of inheritance exists when there exists a phenotype that is “intermediate” between those of the parents
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Incomplete dominance
Non-Mendelian :
$400 Question
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This type of inheritance takes place when you can see both phenotypes expressed when two different alleles are inherited
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Co-dominance
Non-Mendelian :
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This type of inheritance will have ONLY female carriers
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Transcription :
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Sex-linked
Punnett Squares:
$100 Question
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The ability to taste PTC is dominant over non-tasting. A non-taster and a heterozygous taster have children. What is the phenotypic ratio of the offpring?
Punnett Squares :
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1 taster:1 nontaster
Punnett Squares :
$200 Question
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A person with type A blood marries a person with type B blood. They have a child with type O blood. Create the Punnett square to show this inheritance. What is the chance of having a child with type O?
Punnett Squares :
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25%
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Brown hair (B) is dominant blonde hair (b) is recessive.
Straight hair (S) is dominant and curly hair (s) is recessive.
A man who is homozygous for brown, straight hair mates with a woman who is homozygous for blonde, curly hair. What is the chance they will have a child with brown, straight hair?
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9/16
Punnett Squares :
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Colorblindess is sex-linked recessive. A man who is colorblind marries and carrier female. What is a chance they will have a child who is color blind?
Punnett Squares :
$400 Answer
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50%
Punnett Squares :500
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ANSWER
What is a test cross? What do the results of a test cross indicate?
Punnett Squares :500
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If you do not know the genotype of an individual with the dominant phenotype you can cross it with a homozygous recessive individual.
All dominant phenotype in F1 = homozygous dominant
1:1 ratio of dominant phenotype to recessive phenotype
Pedigrees:
$100 Question
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A circle represents….
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female
Pedigree:
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What type of inheritance pattern?
Pedigrees:
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Autosomal recessive
Pedigrees:
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What type of inheritance pattern?
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Sex-Linked Recessive
Pedigrees:
$400 Question• What type of inheritance pattern?
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Pedigrees:
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Autosomal Dominant
Pedigrees: $500 Question
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Use your white board to draw this pedigree. Label all genotypes.
Zack and Kelly have 3 children, a son and two daughters. Their son is color blind. The youngest daughter marries and also has a son who is color blind.
Pedigrees: $500 Answer
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See board
Vocab:
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alternative forms of a gene that occurs at the same locus on homologous chromosomes.
Vocab: :
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alleles
Vocab: :
$200 Question
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this occurs when one gene locus masks or modifies the phenotype of a second gene locus
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epistasis
Vocab: :
$300 Question
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occurs when a single mutant gene affects two or more distinct and seemingly unrelated traits.
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plietropy
Vocab: :
$400 Question
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A diagram that traces the inheritance of a trait through generations of a family
Vocab: :
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Pedigree
Vocab: :
$500 Question
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These are proteins in the plasma of blood that are responsible for blood type compatibility
Vocab: :
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antibodies
FINAL ROUND Question
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ANSWER
Tall is dominant over short. Purple is dominant over white. A heterozygous purple, short plant is crossed with a white, heterozygous tall plant.
Complete a dihybrid cross and determine the phenotypic ratio. (must show work)
FINAL ROUND Question
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ANSWER
1:1:1:1
