Download Codom & Incomplete Dom QUICK version 2014
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Download Download Codom & Incomplete Dom QUICK version 2014...
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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
BW ANSWERS A. 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) “FATHER OF GENETICS” -experiments with pea plants led to understanding of dominant vs recessive -experiments unappreciated during his time, died in 1884 due to kidney failure
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 HANDOUT Parent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
A O
AA, Ao oo
Ao, oo
A, O
B, AB
A B
AA, Ao BB, Bo
AB, Ao, Bo, oo
AB, A, B, O
none
AB O
AB oo
Ao, Bo
A, B
AB, O
B O
BB, Bo oo
Bo, oo
B, O
A, AB
AB A
AB AA, Ao
AA, AB, Ao, Bo
A, B, AB, O
none
AB B
AB BB, Bo
AB, BB, Ao, Bo
A, B, AB, O
none
O O
oo oo
oo
O
A, B, AB
AB AB
AB AB
AA, BB, AB
A, B, AB
O
A A
AA, Ao AA, Ao
AA, Ao, oo
A, O
B, AB
Rule 1
Both
A and B alleles are dominant over o. So, individuals who have an Ao genotype will have an A phenotype.
The
RULE 2
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.
Rule: 3 People
who are type O have oo genotypes. In other words, they inherited a recessive o allele from both parents.
PRACTICE
What are the phenotypes of the following genotypes?
AA
Bo
Type B (o is recessive)
Homozygous recessive
Type A
Type O
AB
Type AB (codominant)
PUNNETT SQUARE
You
perform blood crosses just the same way as you would any other Punnet Square. Example: Ao Mom and a by vote of fingers, how many Bo Dad Show offspring genotypes are possible? 4 = (Ao, Bo, AB, oo)
BLOOD TYPE WORKSHEET Parent’s Blood Types
Parent’s Possible Genotypes
A O
AA, Ao oo
A B
AA, Ao BB, Bo
AB, Ao, Bo, oo
AB, A, B, O
none
AB O
AB oo
Ao, Bo
A, B
AB, O
B O
BB, Bo oo
Bo, oo
B, O
A, AB
AB A
AB AA, Ao
AA, AB,did Ao, a BoPunnett A, B, AB, O They
none
AB B
AB BB, Bo
Square for all potential AB, BB, Ao, Bo crosses: A, B, AB, O
none
O O
oo oo
AB AB
? ?
Offsprings’ Possible Genotypes
Ao, oo
?
Offsprings’ Possible Blood Types
A, O
?
Offsprings’ Blood Types NOT Possible
B, AB
?
oo
O
A, B, AB
AB AB
AA, BB, AB
A, B, AB
O
A A
AA, Ao AA, Ao
AA, Ao, oo
A, O
B, AB
B B
BB, Bo BB, Bo
BB, Bo, oo
B, O
A, AB
AA x oo AND Ao x oo
GUIDED PRACTICE Parent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
A O
AA, Ao oo
Ao, oo
A, O
B, AB
A B
AA, Ao BB, Bo
AB, Ao, ?Bo, oo
AB, A, B, ?O
none
AB O
AB oo
Ao, Bo
A, B
AB, O
B O
BB, Bo oo
Bo, oo
B, O
A, AB
AB A
AB AA, Ao
AA, AB, Ao, Bo
A, B, AB, O
none
AB B
AB BB, Bo
O O
oo oo
AB AB
AB AB
A A
AA, Ao AA, Ao
AA, Ao, oo
A, O
B, AB
B B
BB, Bo BB, Bo
BB, Bo, oo
B, O
A, AB
? ?
Show your work (in notebook) allB, AB, O AB, BB, Ao, Bo for A, potential crosses: AA x BB O oo Ao x BB AA, BB,AA AB x Bo A, B, AB Ao x Bo
?
none A, B, AB O
CONTINUE THE BLOOD TYPE PRACTICE PROBLEMS (DO PUNNETS IN NOTEBOOK)
ANSWER KEY Parent’s Blood Types
Parent’s Possible Genotypes
Offsprings’ Possible Genotypes
Offsprings’ Possible Blood Types
Offsprings’ Blood Types NOT Possible
A O
AA, Ao oo
Ao, oo
A, O
B, AB
A B
AA, Ao BB, Bo
AB, Ao, Bo, oo
AB, A, B, O
none
AB O
AB oo
Ao, Bo
A, B
AB, O
B O
BB, Bo oo
Bo, oo
B, O
A, AB
AB A
AB AA, Ao
AA, AB, Ao
A, B, AB
O
AB B
AB BB, Bo
AB, BB, Bo
A, B, AB
O
O O
oo oo
oo
O
A, B, AB
AB AB
AB AB
AA, BB, AB
A, B, AB
O
A A
AA, Ao AA, Ao
AA, Ao, oo
A, O
B, AB
B B
BB, Bo BB, Bo
BB, Bo, oo
B, O
A, AB
INCOMPLETE DOMINANCE What do you think “incomplete” dominance looks like?
INCOMPLETE DOMINANCE In
the heterozygous genotype, the alleles are BLENDED in the phenotype Uses only capital letters
Red flower x white flower = Pink flower
SLATE PRACTICE… BB
= blue YY = yellow BY = green What would be the genotype of GREEN flowers? (green is a color that is “inbetween” yellow and blue)
Do a Punnett Square cross between 2 green flowers
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
CLOSURE Do a Venn Diagram with the similarities and differences between codominance & incomplete dominance
HTTPS://WWW.WNYC.ORG/RADIO/#/ONDEMAN D/91597
RadioLab (5:26-14:00)
Vocab Quiz 1. 2. 3. 4.
Allele Genotype Heterozygous Homologous Chromosomes 5. Phenotype 6. Recessive 7. Dominant 8. Punnett Square 9. Homozygous 10. 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 & Grade 1. J 2. C 3. A 4. E 5. G 6. D 7. B 8. F 9. H 10. I
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