1. If Cabs baseball is dominant over Falcons baseball: (B & b)
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Transcript of 1. If Cabs baseball is dominant over Falcons baseball: (B & b)
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BW HAVE SLATE, MARKER & ERASER ON DESK, & SEPARATE SHEET OF PAPER MUST WORK QUICKLY & STAY ON TASK!
1. If Cabs baseball is dominant over Falcons baseball: (B & b)
a. Write the genotype for a heterozygous father.
b. Write the genotype for a homozygous recessive mother.
c. Draw a punnett square to show the possibilities for their offspring.
d. What are the genotype frequencies for offspring? (use vocab)
e. What are the phenotype frequencies?***Review your genetics notes when finished
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BW ANSWERSA. Bb (heterozygous)
B. bb (homozygous recessive)
C. (Punnett Square)
D. 50% homozygous recessive 50% heterozygous
E. 50% Falcons 50% Cabs
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THIS WEEK:Wednesday: Punnet square practice, Codominance, Incomplete dominance
worksheest
Thursday: Review genetics, quiz on VOCAB
Friday: Genetic Disease brochure due All genetic worksheets due (binder check)
*I will have your notebooks graded over the weekend- sorry it has been a MONTH!
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Gregor Mendel (1822- 1884)
-experiments with pea plants led to understanding of dominant vs recessive-experiments unappreciated during his time, died in 1884 due to kidney failure
“FATHER OF GENETICS”
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DO ALL ORGANISMS FOLLOW MENDEL’S LAW OF DOMINANCE?
How does skin color work in humans?
What about height?
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CODOMINANCE
What does the prefix “co” mean? (hint: Coworkers, Cooperation, Co-captains…)
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CODOMINANCE:In heterozygous genotypes, both of the alleles are expressed TOGETHER in the phenotype.
Uses only capital letters RED x WHITE
= RED&WHITE
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What is the genotype for a black cow?
BB
What is the genotype for a white cow?
WW
What is the genotype for a black AND white cow??
BW
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P= BB X WW(do the Punnett square)
F1= 100% BW
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BLOOD TYPES
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3 BLOOD TYPE RULES- WRITE ON SIDE OF BLOOD TYPE HANDOUTParent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
AO
AA, Aooo
Ao, oo A, O B, AB
AB
AA, AoBB, Bo
AB, Ao, Bo, oo AB, A, B, O none
ABO
ABoo
Ao, Bo A, B AB, O
BO
BB, Booo
Bo, oo B, O A, AB
ABA
ABAA, Ao
AA, AB, Ao, Bo A, B, AB, O none
ABB
ABBB, Bo
AB, BB, Ao, Bo A, B, AB, O none
OO
oooo
oo O A, B, AB
ABAB
ABAB
AA, BB, AB A, B, AB O
AA
AA, AoAA, Ao
AA, Ao, oo A, O B, AB
BB
BB, BoBB, Bo
BB, Bo, oo B, O A, AB
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Both A and B alleles are dominant over o.
So, individuals who have an Ao genotype will have an A phenotype.
Rule 1
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RULE 2The A and B alleles are codominant.
Therefore, if an A is inherited from one parent and a B from the other, the phenotype will be AB.
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People who are type O have oo genotypes.
In other words, they inherited a recessive o allele from both parents.
Rule: 3
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PRACTICE What are the phenotypes of the following genotypes?
AAType A
BoType B (o is recessive)
Homozygous recessiveType O
ABType AB (codominant)
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PUNNETT SQUAREYou perform blood crosses just the same way as you would any other Punnet Square.Example: Ao Mom and a Bo DadShow by vote of fingers, how many
offspring genotypes are possible?
4 = (Ao, Bo, AB, oo)
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BLOOD TYPE WORKSHEETParent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
AO
AA, Aooo
Ao, oo A, O B, AB
AB
AA, AoBB, Bo
AB, Ao, Bo, oo AB, A, B, O none
ABO
ABoo
Ao, Bo A, B AB, O
BO
BB, Booo
Bo, oo B, O A, AB
ABA
ABAA, Ao
AA, AB, Ao, Bo A, B, AB, O none
ABB
ABBB, Bo
AB, BB, Ao, Bo A, B, AB, O none
OO
oooo
oo O A, B, AB
ABAB
ABAB
AA, BB, AB A, B, AB O
AA
AA, AoAA, Ao
AA, Ao, oo A, O B, AB
BB
BB, BoBB, Bo
BB, Bo, oo B, O A, AB
?? ? ? ?
They did a Punnett Square for all
potential crosses:
AA x oo AND Ao x oo
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GUIDED PRACTICEParent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
AO
AA, Aooo
Ao, oo A, O B, AB
AB
AA, AoBB, Bo
AB, Ao, Bo, oo AB, A, B, O none
ABO
ABoo
Ao, Bo A, B AB, O
BO
BB, Booo
Bo, oo B, O A, AB
ABA
ABAA, Ao
AA, AB, Ao, Bo A, B, AB, O none
ABB
ABBB, Bo
AB, BB, Ao, Bo A, B, AB, O none
OO
oooo
oo O A, B, AB
ABAB
ABAB
AA, BB, AB A, B, AB O
AA
AA, AoAA, Ao
AA, Ao, oo A, O B, AB
BB
BB, BoBB, Bo
BB, Bo, oo B, O A, AB
?? ? ? ?
Show your work (in notebook) for all
potential crosses: AA x BBAo x BBAA x BoAo x Bo
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CONTINUE THE BLOOD TYPE PRACTICE PROBLEMS (DO PUNNETS IN NOTEBOOK)
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ANSWER KEYParent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
AO
AA, Aooo
Ao, oo A, O B, AB
AB
AA, AoBB, Bo
AB, Ao, Bo, oo AB, A, B, O none
ABO
ABoo
Ao, Bo A, B AB, O
BO
BB, Booo
Bo, oo B, O A, AB
ABA
ABAA, Ao
AA, AB, Ao A, B, AB O
ABB
ABBB, Bo
AB, BB, Bo A, B, AB O
OO
oooo
oo O A, B, AB
ABAB
ABAB
AA, BB, AB A, B, AB O
AA
AA, AoAA, Ao
AA, Ao, oo A, O B, AB
BB
BB, BoBB, Bo
BB, Bo, oo B, O A, AB
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INCOMPLETE DOMINANCE
What do you think “incomplete” dominance looks like?
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INCOMPLETE DOMINANCEIn the heterozygous genotype, the alleles are BLENDED in the phenotype
Uses only capital lettersRed flower x white flower
= Pink flower
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SLATE PRACTICE…
BB = blue YY = yellow BY = green
Do a Punnett Square cross
between 2 green flowersWhat would be the
genotype of GREEN flowers?
(green is a color that is “inbetween” yellow and
blue)
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INCOMPLETE DOMINANCE
Practice with the spongebob worksheet.
Both handouts due Friday. Turn in early for extra credit.
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HETEROCHROMIA IRIDIS
chimerism, where two or more genotypes arise from the fusion of more than one fertilized zygote in the early stages of embryonic development.
In genetics, a mosaic or mosaicism denotes the presence of two or more populations of cells with different genotypes in one individual who has developed from a single fertilized egg
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CLOSUREDo a Venn Diagram with the similarities and
differences between codominance & incomplete dominance
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HTTPS://WWW.WNYC.ORG/RADIO/#/ONDEMAND/91597
RadioLab (5:26-14:00)
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Vocab Quiz1. Allele2. Genotype3. Heterozygous4. Homologous
Chromosomes5. Phenotype6. Recessive7. Dominant8. Punnett
Square9. Homozygous10. Genetics
A. Genotype with 2 different alleles (Bb)
B. The allele that is ALWAYS expressed in the phenotype, even if only one is present
C. The alleles that a person has, their genetic makeup
D. The allele that is ONLY expressed in the phenotype if both are the same
E. A pair of chromosomes that has genes for the same TRAITS, but may have different alleles
F. A chart that predicts allele combinations
G. The physical appearance of an organism
H. A genotype with two of the same alleles (BB or bb)
I. The study of heredity (inheritance)J. A version of a gene
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Trade & Grade1. J2. C3. A4. E5. G6. D7. B8. F9. H10. I