BIO505T Midterm MCQs Guess Paper 2023 by Sulman Ali

BIO-301 MCQs MIDTERM- 100% · GUESS PAPER 2023 · Essentials of Genetics · BY SULMAN ALI · OBJECTIVES

1. An allele with only sometimes produce the symptoms or trait with which it has been associated at a detectable level = Incomplete dominance
2. A smooth curve is property of = Continuous variation
3. According to Mendel every trait is controlled by = Two factors/alleles
4. Skin color of human is controlled by = Multiple genes
5. Gene density is more in = Eukaryotic genomes

6. Groups of human chromosomes are = 23 pairs

7. Linkage mapping of Drosophila was possible if eye color gene was placed = On the X
8. Fur color in Labrador retriever is controlled by = Multiple gene
9. Which of the following is not a cause of epigenetics? = Change in DNA sequence

10. Visible regions on chromosomes are regions of crossing over = Chiasmata

11. Building blocks of chromosomes are known as nucleotide genetic helps us to

understand the process of = Chromosome structure and function

12. Have the same length, shape, centromere location, and gene = Homologous
13. In Drosophila, the female gene are located on the = X chromosome

14. Lamp brush chromosomes are found inside = Oocytes and spermatocytes

15. Entire DNA of each of the chromosomes replicates. Replication is = Semi-conservative
16. First phase of mitosis = Prophase
17. Example of a diploid cell = Somatic cell
18. Meiosis in male is called = Spermatogenesis
19. The two replicated homologous chromosomes separate during the = Anaphase I
20. Type of cell division important for tissue regeneration is = Mitosis
21. Whose experimental result gave the first solid evidence indicating that a gene is associated with specific chromosomes = Thomas Hunt Morgan MCQs:
22. Size of chromatin fiber = 30 nanometers
23. Dark constriction in chromosome called = Centromere
24. Size of bands in giant chromosome in Drosophila = 5000 base pairs
25. Building blocks of chromosomes = Nucleotides
26. Mendel describe the idea about = Heredity
27. Studies group heredity for traits determined by many genes simultaneously =

28. Quantitative genetics

29. The microtubules that push the spindle poles apart are called aster microtubules
30. Female bee sex is = diploid)
31. Which is correct = 70% are mono-allelic, they exist only in one form.
32. Height of human being is an example of = Continuous variation MCQs:
33. Condition in which both alleles are expressed = Co-dominance
34. Color of hydrangea plant changes by soil = ph level Environmental factor

35. XO system of sex present in = Insects, such as grasshoppers and crickets

36. DNA replication is = Semi-conservative
37. Single duplication of chromosomes occurs in = S-phase of interphase
38. If the gene is closely linked, then = They are less likely to be separated by

recombination events during meiosis

39. Linkage mapping of Drosophila was possible if eye color gene is placed = On the X
40. Gene will be switched on when = Transcription factors bind to the promoter region of the gene
41. Position of the dark-staining areas = Centromere and heterochromatin
42. Process that converts the cell into two is called = Cell division
43. Inherited variation results from the activity of = Genes and the environment
44. Condensation of chromosomes is observed in = Prophase of mitosis/meiosis
45. Example of diploid cell = Somatic cell
46. Genetics helps us in = Understanding inheritance patterns and genetic disorders, developing new technologies and therapies, and studying evolution and diversity
47. Correct sequence of bottom mapping techniques = Comparative, physical, linkage, restriction fragment length polymorphism (RFLP), amplified fragment length polymorphism (AFLP)
48. In complete dominance, one allele completely masks the expression of the other allele.
49. Phenotype depends upon a complex interaction between genotype and environment.
50. Type of heterochromatin that can change to euchromatin is Facultative heterochromatin.
51. Cytokinesis in plants occur by cell plate.
52. Sister chromatids are identical in mitosis and meiosis II.
53. Height of human beings is an example of continuous variation.
54. Hemophilia is a recessive gene disorder, X-linked.
55. In metaphase, there is no RNA or protein synthesis, only DNA is condensed and lined up at the equator of the cell.
56. Karyotyping is the sub-discipline of genetics that deals with the study of the banding pattern of chromosomes.
57. When Mendel crossed a true-breeding pea strain that produced smooth seeds in the parental generation, the results were completely dominant to wrinkled seeds.
58. The law of independent assortment with dihybrid gives a genotypic ratio in F2 as 9:3:3:1.
59. Variations that result from acquired characteristics are not acted upon by natural selection and thus do not affect evolution.
60. There are approximately 5,800 genes present in yeast.
61. The allele is said to have complete penetrance if all individuals who have the disease- causing mutation have clinical symptoms of the disease.
62. During mitosis, the centromere that is shared by sister chromatids must divide so that chromatids can migrate to opposite poles.
63. The point mutation in the CDE_III subdomain completely eliminates the ability of the centromere to function during segregation.
64. Nucleotides are the building blocks of nucleic acids.
65. The process by which prokaryotes divide their cells into two daughter cells is called

binary fission. 19) The microtubules that push the spindle poles apart are called aster

microtubules.

66. Meiosis involves two cell division processes, meiosis I and meiosis II, resulting in the formation of four haploid daughter cells from a diploid parent cell.
67. The cytokinesis in animal cells is characterized by a cleavage furrow.
68. CGG repeats of 200 is seen in individuals with fragile X.
69. The principles of heredity were explained by Gregor Mendel.
70. The cross of TTPP x ttpp would result in the F1 generation being TtPp.
71. A correct statement about Mendel’s model is that there is a clear dominant-recessive relationship between alleles.
72. When the centromere is very near to the end of the chromosome, it is called telocentric.
73. There are four types of chromosomal bands in humans.
74. In prokaryotes, a single circular DNA is present in the nucleoid region.
75. Chromosomes are identified by their size, shape, and banding pattern.
76. A ZW female is heterogametic.
77. Lampbrush chromosomes are found in all vertebrates, invertebrates, and plants.
78. Lampbrush chromosomes were discovered by Flemming in 1882.
79. As a result of mitosis, the cells produced are called daughter cells.
80. The X-O system is present in grasshoppers.
81. If a normal father and color-blind mother have children, the ratio of blind sons will be 2:4.
82. The duration of interphase is 90% of the cell cycle.
83. The nutrition of a mother can affect the epigenome of a fetus.
84. Two enzyme types are involved in histone acetylation.
85. When two mutations together have a smaller effect than the effect seen when they are alone, it is called a negative effect.
86. In the ABO blood group system, two of the alleles are codominant to each other.
87. If a mother has a disorder, she will transmit the mutant allele to her sons but not her daughters.
88. In the ZW and ZZ system, the female is ZW.
89. The 70nm is the relative frequency of a particular characteristic.
90. In telophase of meiosis, the cells divide into four haploid cells.
91. The G0 phase is also called the post-mitotic phase.
92. Reproduction in prokaryotes occurs through binary fission.
93. The building blocks of proteins are amino acids.
94. In E.coli, approximately 3000-4000 genes are present.
95. A point mutation in the CDE_III subdomain completely eliminates the ability of centromere function.
96. Linker DNA has approximately 20-60 base pairs.
97. The comb shape in chickens can exhibit four different shapes.
98. E.coli has approximately 3000-4000 genes organized into its one circular chromosome.
99. The comb shape is controlled by two genes found on two different chromosomes. The genotype bbee is not of the golden cast color in Labrador retrievers. Co-dominance appears in the AB blood group phenotype. A female bee’s sex is determined by the ZW system. Tetrads align at the center in metaphase. The pleiotropic effect is shown in all of cystic fibrosis, sickle cell anemia, and Huntington’s disease. The ratio of F2 in a dihybrid cross between TTRR and ttrr is 9:3:3:1. Protozoa can have 300 or more chromosomes. Roundworms have only two chromosomes. Onions and molds have 16 chromosomes.