53. The genetic constitution of Brassica carinata is a) AACC b) AABB c) BBDD d) BBCC 54. The genetic constitution of Brassica nigra is a) BB b) CC c) DD d) AA 55. Which of the following species of Brassica is tetraploid? a) B. nigra b) B. juncea c) B. campestris d) B. oleracea 56. Which of the following species of Brassica is diploid? a) B. napus b) B. carinata c) B. juncea d) B. oleracea 57. Triangle for the origin of tetraploid species of Brassica was proposed in 1935 by a) Kihara b) Ono c) Sears d) Nagaharu, U 58. Hexaploid wheat behaves like diploid species due to a) 5B system b) 5A system c) 5D system d) 3D system 59. The progenitor of cultivated cotton is a) Gossypium thurberi b) G. raimondii c) G. tomentosa d) G. africanum 60. Aneuploidy refers to a) nullisomics b) polysomics c) monosomics d) all of these 61. One of the features of polyploids in plants is that a) they have higher fertility and seed set than regular diploids b) their chromosomes pair and disjoin neatly c) deleterious dominant alleles are exposed d) they do not survive e) they have extra whole sets of chromosomes 62. If the diploid chromosome number of an organism is n=16, the octoploid has a) 8 b) 16 c) 24 d) 32 e) 64 63. In dosage compensation a) an X chromosome can be inactivated b) gene expression can be increased in a single X chromosome c) gene expression can be reduced from a pair of X chromosome d) all of the above e) none of the above 64. Which of the following statements regarding X inactivation in mammals is false? a) the process is entirely random b) X inactivation may occasionally occur in males c) this process ensures a homogenous phenotype in heterozygotes d) X inactivation occurs early in embryonic development 65. Monoallelic expression of a gene a) occurs when one copy of the gene has been deleted b) occurs when one copy of the gene carries a mutation c) occurs when the gene is imprinted d) is not seen in mammals
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The genetic constitution of Brassica carinata is a) AACC b) AABB c) BBDD d) BBCC 54. The genetic constitution of Brassica nigra is a) BB b) CC c) DD d) AA 55. Which of the following species of Brassica is tetraploid? a) B. nigra b) B. juncea c) B. campestris d) B. oleracea 56. Which of the following species of Brassica is diploid? a) B. napus b) B. carinata c) B. juncea d) B. oleracea 57. Triangle for the origin of tetraploid species of Brassica was proposed in 1935 by a) Kihara b) Ono c) Sears d) Nagaharu, U 58. Hexaploid wheat behaves like diploid species due to a) 5B system b) 5A system c) 5D system d) 3D system 59. The progenitor of cultivated cotton is a) Gossypium thurberi b) G. raimondii c) G. tomentosa d) G. africanum 60. Aneuploidy refers to a) nullisomics b) polysomics c) monosomics d) all of these 61. One of the features of polyploids in plants is that a) they have higher fertility and seed set than regular diploids b) their chromosomes pair and disjoin neatly c) deleterious dominant alleles are exposed d) they do not survive e) they have extra whole sets of chromosomes 62. If the diploid chromosome number of an organism is n=16, the octoploid has a) 8 b) 16 c) 24 d) 32 e) 64 63. In dosage compensation a) an X chromosome can be inactivated b) gene expression can be increased in a single X chromosome c) gene expression can be reduced from a pair of X chromosome d) all of the above e) none of the above 64. Which of the following statements regarding X inactivation in mammals is false? a) the process is entirely random b) X inactivation may occasionally occur in males c) this process ensures a homogenous phenotype in heterozygotes d) X inactivation occurs early in embryonic development 65. Monoallelic expression of a gene a) occurs when one copy of the gene has been deleted b) occurs when one copy of the gene carries a mutation c) occurs when the gene is imprinted d) is not seen in mammals
Sri K.
You study the pattern of the genes and how they differ between the two types of flowering plants, detection of chromosome structure, and studying the few yellow-flowered plants, which genome is chosen randomly. While the new yellow-flowered plants are accidentally pollinated with pollen from one of the original red-flowered plants, they produce some seeds; but the flower color is deformed and not all of them follow the same pattern. Which of the following statements are correct complaints about these two types of plants that were not able to be successfully constructed? The yellow-flowered plant contains unstructured chromosomes and these chromosomes are not homologous. Chromosome structure of the original red-flowered plant is different from the yellow-flowered plant. Pollen from other original red-flowered plants interfered with pollination in the greenhouse. One way to define selective breeding is to breed plants that are successfully bred and produce offspring that are fertile, then they are genetically different from their parents. Imagine that more yellow-flowered plants randomly appear in your flower population, then breed them with other yellow-flowered plants. Can you successfully breed and produce offspring that are genetically different from their parents?
Adi S.
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