Level Genetics Review (Page 6 of 7) in pdf

Level Genetics Review Page 6

The diagrams below represent the sex chromosomes.

45. Is diagram A male or female?

Is diagram B male or female?

THE FOLLOWING PEDIGREE SHOWS THE INHERITANCE PATTERN OF CYSTIC

FIBROSIS. USE THE PEDIGREE TO ANSWER QUESTIONS 46-58.

III

46.How many females are represented in the pedigree?

47. How many cystic fibrosis females are found in the pedigree?

48. How many normal females are found in the pedigree?

49. How many normal males are found in the pedigree?

50. How many cystic fibrosis males are found in the pedigree?

51. What type of twins (II 6-7) are represented?

52. What type of twins (III 3-4) are represented?

53. Which set of twins do BOTH of the individuals have cystic fibrosis? Set

(II 6-7) or set (III 3-4)

54. Is cystic fibrosis a recessive or dominant gene?

55. What is the genotype of person III-6?

56. What is the phenotype of I-1?

57. Is I-3 homozygous recessive, homozygous dominant or

heterozygous?

58. Is I-2 homozygous recessive, homozygous dominant or

heterozygous?

Level Genetics Review Page 6