Chapter 5 Heredity

1. Chapter 5 Heredity Pages 125-143

2. Genetics terminology • Traits – things that you inherit from your parents • Heredity – the passing of traits from parents to offspring • Genetics- the study of how the traits are inherited • Probability- the chance that something will take place (odds)

3. The code for traits is carried on chromosomes

4. This code is called the genotype. • The result of the code is called the phenotype • Tongue Rolling example

5. Genotype can be • Heterozygous • Homozygous

6. Vocab we all need to know… • Dominant Trait– • Recessive Trait- • Heterozygous- • Homozygous- • Genotype- • Phenotype

7. Pompe Disease

8. It is a recessive disease.

9. The Punnett Square • 1. Traits • 2. Parents

10. Punnett Square

11. Genotypes and % • Phenotypes and %

12. Mice and Fur Problem

13. Gregor Mendel – The father of genetics

14. Worked with pea plants (30,000 total) • Found out that some traits were dominant and some recessive

15. Mendel’s Laws of Heredity • 1. Traits are controlled by alleles on chromosomes. • 2. Alleles can be dominant or recessive. • 3. During meiosis the chromosomes that carry the two forms of the allele go into separate sex cells (gametes). • Punnett Square

16. Fruit Fly Lab

17. Genetics News

18. Punnett Square Practice • 1a. BB x bb

19. Problem 1b. • Bb x Bb

20. Problem 2a Yy x Yy

21. Problem 2b Yy x yy

22. Conclusion…. • According to my to hypothesis our prediction of male to female should have 1:1. Our data was close, for example

23. Incomplete Dominance • When you have two alleles and both are dominant.

25. Sex Linked Traits • Traits that associated with being male or female

27. Hemophilia

28. How to do a punnett square for sex-linked traits. • In humans colorblindness is a sex-linked recessive trait. Show the possible children of a female carrier and a normal male.

30. ATB-In mice having fur is a dominant trait, what can you say about the genotype of this creature?

31. Fly lab 2

32. Punnett Square Problems

33. Lemming Lab • http://www2.edc.org/weblabs/Punnett/punnettsquares.html

34. Problem 2

35. Problem 3 Fly Packet Dihybrid cross

37. Fly Lab # 3 Dihybrid Cross • Predictions for Phenotypes • Orange & Round = 56.25% • Orange & Bar = 18.75% • Black and Round = 18.75% • Black and Bar = 6.25%

38. Lab • Four different colors of dice • Female • Blue (body color) • Yellow (eye shape) • Male • White (body color) • Black (eye shape)

39. Human Sex Determination • Human Chromosomes • Hemophilia a sex linked disease

40. Fly packet conclusions due Wednesday…. • For each give a purpose statement saying what was the lab about. • Type your conclusion

41. Colorblindness is a sex-linked disease, show the offspring of a female carrier and a male with the disease. • color vision test

42. Incomplete Dominance • In some flowers white and red flowers have incomplete dominance. What types of offspring could a red and white flower have?

43. Polygenic Inheritance • When many genes contribute to a trait. • It produces a wide variety of results in the phenotype. • Hair color, eye color, height, weight,

44. Blood Type • 3 genes determine blood type,A, B, O • You only get 2 at a time • A and B are “co-dominant” • O recessive • blood type

45. 50-50 chances lab Coin flip lab Lemming lab Punnett square ws Punnett square quiz Biologica (dragon) Punnett sq. review crossword Pea pod lab Polygenic lab (height) Green pepper lab Fly packet Inherited traits (face) Fly conclusions Chapter rev NTWS Portfolios Due Tuesday

46. Make your own color blindness test

48. Blood Type • Multiple alleles • Co-dominance • Blood Type Gene Possiblities

49. Chart of Blood Types

50. Universal Donor – can give blood to anyone • Type O • Universal Recipient – can get blood from anynone • Type AB