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. - PowerPoint PPT PresentationTRANSCRIPT
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
BW ANSWERSA. Bb (heterozygous)
B. bb (homozygous recessive)
C. (Punnett Square)
D. 50% homozygous recessive 50% heterozygous
E. 50% Falcons 50% Cabs
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!
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”
DO ALL ORGANISMS FOLLOW MENDEL’S LAW OF DOMINANCE?
How does skin color work in humans?
What about height?
CODOMINANCE
What does the prefix “co” mean? (hint: Coworkers, Cooperation, Co-captains…)
CODOMINANCE:In heterozygous genotypes, both of the alleles are expressed TOGETHER in the phenotype.
Uses only capital letters RED x WHITE
= RED&WHITE
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
P= BB X WW(do the Punnett square)
F1= 100% BW
BLOOD TYPES
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
Both A and B alleles are dominant over o.
So, individuals who have an Ao genotype will have an A phenotype.
Rule 1
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.
People who are type O have oo genotypes.
In other words, they inherited a recessive o allele from both parents.
Rule: 3
PRACTICE What are the phenotypes of the following genotypes?
AAType A
BoType B (o is recessive)
Homozygous recessiveType O
ABType AB (codominant)
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)
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
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
CONTINUE THE BLOOD TYPE PRACTICE PROBLEMS (DO PUNNETS IN NOTEBOOK)
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
INCOMPLETE DOMINANCE
What do you think “incomplete” dominance looks like?
INCOMPLETE DOMINANCEIn the heterozygous genotype, the alleles are BLENDED in the phenotype
Uses only capital lettersRed flower x white flower
= Pink flower
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)
INCOMPLETE DOMINANCE
Practice with the spongebob worksheet.
Both handouts due Friday. Turn in early for extra credit.
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
CLOSUREDo a Venn Diagram with the similarities and
differences between codominance & incomplete dominance
HTTPS://WWW.WNYC.ORG/RADIO/#/ONDEMAND/91597
RadioLab (5:26-14:00)
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
Trade & Grade1. J2. C3. A4. E5. G6. D7. B8. F9. H10. I