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Cell division

1. Meiosis takes place
a) Only in haploid individuals
b) Only in diploid individuals
c) Both in haploid and diploid individuals
d) None of these
2. In one of the following stages of cell division, the DNA content is doubled. It is
cell cycle
a) G1 phase
b) G2 phase
c) Metaphase
d) S phase
3. Amitosis is the usual process of cell division in
a) Meristematic cells
b) Prokaryotic cells
c) Eukaryotic cells
d) Spore mother cells
4. During synapsis the number of thread (Chromonemata) in each chromosome is
a) 2
b) 4
c) 8
d) Many
5. Homologous chromosomes are
Homologous Chromosomes
a) Morphologically and genetically similar
b) Morphologically similar
c) Those which pair during synapsis
d) None of these
6. Cell division of mitosis is a normal process in a living cell but sudden and abnormal mitosis in an organ will some time result in
cancer cells
a) Cancer
b) New organ
c) Zygote
d) Gastrula
7. Synapsis is characteristic of
a) Leptotene
b) Diplotene
c) Zygotene
d) Pachytene
8. The mechanism ensuring genetic continuity in mitosis is
a) Having of chromosome number between the two new cells
b) Formation of cells with 8 chromosomes
c) Formation of two daughter cells
d) Formation of two cells with identical kind of DNA
9. During meiosis crossing over occurs at
Crossing over
a) Diplotene
b) leptotene
c) Pachytene
d) Diakinesis
10. How many generations of mitotic division must occur in a cell of root tip to form 256 cells?
a) 8
b) 32
c) 64
d) 128
  1. b) Only in diploid individuals
  2. d) S phase
  3. b) Prokaryotic cells
  4. a) 2
  5. c) Those which pair during synapsis
  6. a) Cancer
  7. c) Zygotene
  8. d) Formation of two cells with identical kind of DNA
  9. a) Diplotene
  10. a) 8