1. Bell Ringer 2/3/15
Create a monohybrid punnet square from the following information
Mom is homozygous dominant for brown hair, B. Dad is homozygous recessive, b, for blonde hair. What are their potential offspring’s genotypes?
Use B for dominant and b for recessive

2. When Heredity Follows Different Rules

3. Simple Mendelian Inheritance
Inheritance controlled by dominant and recessive paired alleles.
Purple FF
White ff
Pure- breeding P generation
Hybrid F1 generation Ff x

4. FF or Ff = Purple Flowers
In Mendelian Inheritance, Heterozygous and Homozygous Dominant Individuals have the same phenotype.
Purple FF
White ff
Pure- breeding P generation
Hybrid F1 generation Ff x
FF or Ff = Purple Flowers
ff = White Flowers

5. BUT. . . It gets a little more complicated than that

6. Incomplete Dominance
When one allele is not completely dominant over another. You get a mix of the two.

7. Homozygous Heterozygous Homozygous
In incomplete dominance, the heterozygous phenotype is between the two homozygous phenotypes.
Homozygous Heterozygous Homozygous
R R R R’ R’ R’

8. How do we create a punnett square for Incomplete dominance??RR
R’R’ R R’
RR’ x

9. Now you try one
A Heterozygous snapdragon flower is crossed with another Heterozygous snapdragon flower. What Genotypes and Phenotypes could the offspring potentially have? x
RR’
RR’

10. R R R’ R’ R R’ 25% RR 50% R R’ 25% R’ R’ 25% Red 50% Pink 25% White R’

11. Human hair color and type

12. Bell Ringer 2/4/15
Complete the following Incomplete Dominance Punnett square.
R R’ R’

13. Ms. Clawson’s pitbull!
What is unique about her dog’s inheritance?

14. Codominance
When two dominant alleles are expressed at the same time.

15. In Codominance, codominant alleles cause the phenotypes of both homozygotes to be produced in heterozygotes. BB BW WW

16. x BB WW B W BW
= CoDominance

17. Now you try one
A Heterozygous Chicken is crossed with a Homozygous White Chicken. What Genotypes (codes) and Phenotypes (look like) could the offspring potentially have? BW WW

18. W B WW BW
50% BW
50% WW
50% Checkered
50% White

20. Sickle-Cell Anemia-CoDominance
Most common in black Americans whose families originated in Africa and in white Americans whose families originated in the countries surrounding the Mediterranean Sea

21. If homozygous for Sickle-Cell Anemia
The oxygen carrying protein, hemoglobin, differs by one amino acid from normal hemoglobin. This forms crystal like structures than change the shape of the red blood cells to be half-moon shaped.
They block small vessels and slow blood flow, and result in tissue damage and pain.
Results in shorter life spans

22. If heterozygous for Sickle-Cell Anemia
Both normal and half-moon shaped hemoglobin cells are produced (Combo)
They don’t have serious health problems
Can lead relatively normal lives
Show signs if the availability of oxygen is reduced

23. Complete 2nd side of Worksheet:
Incomplete Dominance (finished yesterday)
Complete Dominance (complete & grade today)

24. PICK UP NEW BELLRINGER FROM TABLE!
Monday, April 28th
PICK UP NEW BELLRINGER FROM TABLE!
What is Incomplete Dominance?
What is Codominance?
Using the images below find the genotypes and phenotypes of two heterozygous parents
TAKE OUT Incomplete and Codominance
punnett square assignment!!! BB WW BW

25. Tuesday, April 29th What is Incomplete Dominance? What is Codominance?
Using the image below find the genotypes and phenotypes of two heterozygous parents BB WW BW

26. Homozygous Heterozygous Homozygous
In incomplete dominance, the heterozygous phenotype is between the two homozygous phenotypes.
Homozygous Heterozygous Homozygous
R R R R’ R’ R’

27. In Codominance, codominant alleles cause the phenotypes of both homozygous individuals to be produced in heterozygous individuals. BB BW WW

28. Multiple Alleles B = Dominant to b but recessive to B B = Dominant b
Some traits can have multiple alleles that control what phenotype an organism will have. B
= Dominant to b but recessive to B A B
= Dominant b
= Recessive to all alleles A

29. What are ALL of the possible genotypes for the dark brown pigeon
What are ALL of the possible genotypes for the dark brown pigeon? (HINT: there are 3) B
= Dominant to b but recessive to B B A
= Dominant
= Recessive to both of the other alleles b A

30. B A B A B A B A b B

31. Multiple Alleles In Humans
BLOOD TYPING:
Single gene that has multiple alleles O A B AB

32. How is a person’s blood type determined?
By the presence or absence of large molecules (Antigens) on the red blood cells.
Antibodies (part of our immune system) react with foreign antigens so it is important for doctors to know their patients blood type.

34. There are 3 alleles for blood type
ABO Blood Group
HUMAN BLOOD TYPES
PHENOTYPE
GENOTYPE A
AA or AO B
BB or BO AB O OO
There are 3 alleles for blood type
A, B, and O

35. A is dominant to O B is dominant to O A and B are Codominant
HUMAN BLOOD TYPES
PHENOTYPE
GENOTYPE A
AA or AO B
BB or BO AB O OO
There are 3 alleles for blood type:
A, B, and O
A is dominant to O B is dominant to O A and B are Codominant

36. How many different allele combinations are there for each Blood Type?AA AB AO BB BO OO

37. A person with the blood type AO is crossed with a person with the blood type BO. What blood types could their offspring have?

38. A O B OO AO AB BO

39. One parent has the blood type A and the other blood type B
One parent has the blood type A and the other blood type B. What are the genotypes of the parents if they produce children with only blood type AB?
Parents Phenotype
Parents Genotype
Type A
Type B or
A A
A O
B B
B O

40. A B AB A O B BO AB A O B AO AB A O B OO AO AB BO

42. Tuesday, April 29th
1. One parent has the blood type AB and the other has blood type B. What are the genotypes of the parents if they have a 50% chance of having offspring with AB blood.
Parents Phenotype
Parents Genotype
Type AB
Type B or
A B
B B
B O

43. One parent has the blood type A and the other parent has blood type B.
Wednesday, April 30th
One parent has the blood type A and the other parent has blood type B.
1. What are the possible genotypes of the parents if they have a 50% chance to produce children with genotype BO?
Parents Phenotype
Parents Genotype
Type A
Type B or
A A or A O
B B
B O

44. A B AB A O B BO AB A O B AO AB A O B OO AO AB BO

45. How is a person’s blood type determined?
By the presence or absence of large molecules (Antigens) on the red blood cells.
Antibodies (part of our immune system) react with foreign antigens so it is important for doctors to know their patients blood type.

47. Thursday, May 1st
What are ALL of the possible genotypes and phenotypes of the offspring between one parent who is type A blood and one parent who is type AB blood

48. Friday, May 2ND Write EXAM on your Bellringer sheet for today
TURN IN your Genetics Exam Review
Clear your Desk of all paper and Folders—All I should see in front of you is something to write with!!!
**********DO NOT WASTE TIME**********

49. Multiple Alleles B = Dominant to b but recessive to B B = Dominant b
Some traits can have multiple alleles that control what phenotype an organism will have. B
= Dominant to b but recessive to B A B
= Dominant b
= Recessive to both of the other alleles A

50. What are ALL of the possible genotypes for the dark brown pigeon
What are ALL of the possible genotypes for the dark brown pigeon? (HINT: there are 3) B
= Dominant to b but recessive to B B A
= Dominant
= Recessive to both of the other alleles b A

51. B A B A B A B A b B

52. Wednesday, April 30th LAB TODAY
Write LAB under today’s date on your bellringer sheet.
Take out COMPLEX FORMS OF INHERITANCE and BLOOD TYPING PRACTICE activities to turn in

53. PICK UP YOUR FOLDER. TURN IN YOUR HOMEWORK REVIEW DAY
Friday, April 25th
REVIEW DAY
PICK UP YOUR FOLDER.
TURN IN YOUR HOMEWORK
WE WILL BEGIN SHORTLY

54. Incomplete Dominance
When one allele is not completely dominant over another.

55. Homozygous Heterozygous Homozygous
In incomplete dominance, the heterozygous phenotype is between the two homozygous phenotypes.
Homozygous Heterozygous Homozygous
R R R R’ R’ R’

56. How do we create a punnett square for Incomplete dominance??RR
R’R’ R R’
RR’ x

57. Codominance
When two dominant alleles are expressed at the same time.

58. In Codominance, codominant alleles cause the phenotypes of both homozygous individuals to be produced in heterozygous individuals. BB BW WW

59. x BB WW B W BW