Chapter 5 (Sections 1 & 2) Heredity Review Game

1. Chapter 5(Sections 1 & 2) Heredity Review Game

2. 1 An organism with two dominant alleles or two recessive alleles is called ______________. (Write both terms)

3. 1 - Answer An organism with two dominant alleles or two recessive alleles is called homozygous OR purebred.

4. 2 A feature that has different forms in a population is called a ______________.

5. 2 - Answer A feature that has different forms in a population is called a characteristic.

6. 3 Who is the scientist that studied pea plants to determine how traits are passed from parents to offspring? (First and Last Name)

7. 3 - Answer Who is the scientist that studied pea plants to determine how traits are passed from parents to offspring? A: Gregor Mendel

8. 4 Draw a punnett square labeled like this: Male Female

9. 4 Fill in your punnett square for the following scenario:

10. 4 A zoo keeper wants to know the chance that a baby giraffe will have a long neck. The mom is heterozygous for a long neck, and the dad is homozygous for a short neck. Use “L” and “l” to represent the alleles.

11. 4 - Answer Your punnett square should look like this: Male l l l Ll Ll Female l ll ll

12. 5 Look at your punnett square. What is the probability that the baby giraffe will be a purebred? Write the genotype(s) of the purebred offspring.

13. 5 - Answer Look at your punnett square. What is the probability that the baby giraffe will be a purebred? A: 50%, or 2 out of 4 (ll)

14. 6 List the 4 exceptions to Mendel’s findings.

15. 6 - Answer 4 exceptions: • Incomplete dominance • One gene influences many traits • Many genes influence one trait • Environmental Factors

16. 7 A purebred blue flower and a purebred yellow flower are crossed. All of the offspring are green. This is an example of what?

17. 7 - Answer A purebred blue flower and a purebred yellow flower are crossed. All of the offspring are green. This is an example of what? Incomplete Dominance

18. 8 Female b B B BB Bb B = Brown hair b = blond hair If this couple has 4 kids, will 3 of them definitely have brown hair and 1 definitely have blond hair? Explain. Male b Bb bb

19. 8 - Answer Male b B B BB Bb B = Brown hair b = blond hair If this couple has 4 kids, will 3 of them definitely have brown hair and 1 definitely have blond hair? A: No, this is the probability for each child. Female b Bb bb

20. 9 Female b B B BB Bb B = Brown hair b = blond hair List the possible genotypes and phenotypes of this couple’s children. List genotypes first and then the phenotype. Male b Bb bb

21. 9 – Cont. Label your board like this: GenotypePhenotype **Make sure the genotype matches the proper phenotype!

22. 9 - Answer Female b B B BB Bb B = Brown hair b = Blond hair GenotypePhenotype BB – Brown hair Bb – Brown hair bb – Blond hair Male b Bb bb

23. 10 Female b B B BB Bb B = Brown hair b = blond hair What is the probability that this couple will have a hybrid child? List the genotype(s) of the hybrid offspring. Male b Bb bb

24. 10 - Answer Male b B B BB Bb B = Brown hair b = blond hair What is the probability that this couple will have a hybrid child? List the genotype(s) of the hybrid offspring. A: 50% - Bb, Bb Female b Bb bb

25. 11 A child with albinism has skin without pigment and blue eyes. Both of these traits are determined by one set of instructions. This is an example of which exception to Mendel’s findings?

26. 11 - Answer An child with albinism has skin without pigment and blue eyes. Both of these traits are determined by one set of instructions. This is an example of which exception to Mendel’s findings? A: One gene, many traits

27. 12 What is the name of the trait that always shows up, if it is present?

28. 12 - Answer What is the name of the trait that always shows up, if it is present? A: Dominant

29. 13 What is the only combination of alleles that will show the recessive trait? (You must write all the terms that apply)

30. 13 - Answer What is the only combination of alleles that will show the recessive trait? A: homozygous recessive OR purebred recessive

31. 14 What would you call an organism that shows the dominant trait? List all possibilities.

32. 14 - Answer What would you call an organism that shows the dominant trait? List all possibilities. A: Homozygous dominant (purebred dominant) and heterozygous (or hybrid)

33. 15 Using the letter “R” to represent an allele, list the 3 possible combinations of alleles.

34. 15 - Answer Using the letter “R” to represent an allele, list the 3 possible combinations of alleles. A: RR, Rr, rr

35. 16 Kim has curly hair which is a recessive trait (h). What is Kim’s phenotype?

36. 16 - Answer Kim has curly hair which is a recessive trait (h). What is Kim’s phenotype? A: curly hair

37. 17 Kim has curly hair which is a recessive trait (h). What is Kim’s genotype?

38. 17 - Answer Kim has curly hair which is a recessive trait (h). What is Kim’s genotype? A: hh

39. 18 Curly haired Kim falls in love with homozygous Henry who has straight hair (H). Will any of their children be purebred?

40. 18 - Answer Kim h h H Hh Hh H = Straight hair h = curly hair A: No. 100% of their children will be hybrid and will have straight hair. Henry H Hh Hh

41. 19 In Mendel’s experiments, what percent of the offspring in the first generation showed the dominant trait?

42. 19 - Answer In Mendel’s experiments, what percent of the offspring in the first generation showed the dominant trait? A: 100% - all of the offspring were purple

43. 20 In Mendel’s experiments, what percent of the offspring in the first generation carried the recessive allele?

44. 20 - Answer In Mendel’s experiments, what percent of the offspring in the first generation carried the recessive allele? A: 100% - All of the plants had the genotype Pp, and “p” is the recessive allele

45. 21 Different forms of a characteristic are called ________.

46. 21 - Answer Different forms of a characteristic are called traits.

47. 23 What is heredity?

48. 23 - Answer What is heredity? A: Traits passing from parents to offspring

49. 24 The allele for freckles is (f). Suppose two non-freckled parents have 4 non-freckled children and 1 freckled child. What are the genotypes of the parents?

50. 24 - Answer Male f F F FF Ff F = No freckles f = freckles A: Since both parents have no freckles, there are only 2 possible combinations: FF or Ff. Both parents have to be heterozygous (Ff) in order to have a child that has shows the recessive trait of freckles. Female f Ff ff