1. if cabs baseball is dominant over falcons baseball: (b & b)

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