42) Which of the following correctly states Mendel\'s Law of Independent Assortm

Question

42) Which of the following correctly states Mendel's Law of Independent Assortment? a. When a trait is determined by two inheritance factors, one of those factors is expressed even if the other is present in the genome. b. Inheritance factors segregate themselves and into the gametes randomly. c. Inheritance factors for different traits segregate themselves into different gametes independently of each other. d. Blending inheritance is wrong; the units of inheritance behave more like particles. 43) Genes on the same chromosomes are said to be: a. linked b. homologous c. analogous d. alleles 44) We do a two-trait test cross with fruit flies, and cross one with long wings and gray body with a fly with short wings and a black body (long wings and gray body are dominant). All the offspring had a long wings but 47 of themm bodies. What was the genotype of the long-winged, gray-bodied parent? bodies and 49 of them had black c. LLGg 45) Autosomal traits: a. occur on their own c. are sex-linked b. are codominant d. are coded for by genes on the non-sex chromosomes 46) In four-o'-clocks, red and white flower color are incompletely dominant with each other, producing red, white, and pink flowers. What would you expect if you crossed a red and a white four-o'-clock? a. all red-flowered offspring c, ¼ red, ½ pink, and ¼ white d. all pink-flowered offspring 47) What type of frequency distribution does polygenic inheritance usually produce? a. bell curve b. logarithmic c Poisson d. reverse- 48) A woman who is a carrier for hemophilia marries a normal man. What proportion of their sons would you expect to be hemophiliac? none b half c. one quarter d. all of them 49) Neither your mother nor your father are color-blind, but you have a color-blind brother. What does that say about your parent's genotypes? a. mother-XX; father-XY b. mother - XX; father -XY c. mother- XcX; Father XY d. mother-XXe; father -XY -50) On which chromosome do most sex-linked genes occur? a. X b. Y C. d. 21

Explanation / Answer

42. c.

43. a. Linked.

44. c. LLGg.

45. d. Are coded for by genes on the non-sex chromosomes.

46. d. All pink-flowered offspring.

47. a. Bell curve.

48. b. Half.

49. d. Mother - XXc; father - XY.

50. a. X.

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