Cell Division
2002.1.9
In sexually reproducing organisms, maintenance of a species is achieved at meiosis by
A. halving DNA amount
B doubling DNA amount
C. Maintaining DNA amount
D. Increasing DNA amount by four fold.
2002.1.35
At which of the following stages does meiosis occur in the life cycle of a fern? During the formations of the
A. gametes
B. gametophyte
C. spore
D. Sporopyte
2001.1.13
Figure 1 below shows an animal cell during meiosis
which one of the following stages is illustrated?
A. Prophase IB. Prophase II
C. Metaphase ID Metaphase II
2001.1.35
Which of the following is true of diploid parthenogenesis?
A. Meiosis and development without fertilization
B. Mitosis and development after fertilization
C. Meiosis and development after fertilization
D. Mitosis and development without fertilization.
Nov/Dec1998.1.42
(a) (i) what is mutation?
(ii) State possible causes of mutation
(b) What is the role of mutation in evolution of new species?
March 1998.1.1
The following are some of the features of mitosis and meiosis, use them to answer questions 1 and 2.
i) Involves two successive nuclear divisions
ii) Involves formation of chiasmata
iii) Involves separation of sister chromatids
(iv) Occurs during gamete formation
(v) Splitting of centromere followed by anaphase
Which of the following features are limited to mitosis only?
A. (i), (ii) and (iii)
B. (i), (iv) and (v)
C. (ii) and (iv)
D. (iii) and (v)
March 1998.1.2
Which of the feature are limited to meiosis only?
A. (i), (ii) and (iv)
B. (i), (iv) and (v)
C. (ii) and (iv)
D. (iii) and (v)
March 1998.1.4
Crossing over is said to have taken place when
A. chromatids coil on one another and break.
B. chromosomes lose segments
C. Chromatids exchange portions with homologous partner at meiosis
D. there is exchange of chromatids portions with their homologous partner during interphase I
March 1998.1.46
Figure 4 below show a bivalent at a particular stage of meiosis
(a) (i) Name the parts labeled A-D
A……………………… B……………………………..
C. ………………… D. ……………………………..
(ii) what is a bivalent?
(b) At what stage of meiosis is the bivalent? (Give a reason for your answer)
© What role is played by part C?
(d) In abnormal conditions, chromosome set 21 in human may show three similar chromosomes
(i) What does this condition cause in the individual possessing it?
(ii) How does this condition are?
1997.1.2
Which of the following events occur during telophase of mitosis in the meristematic cells of a root tip?
A. Cleavage of the cytoplasm
B. Replication of the centriole
C. replication of chromosomes
D. formation of the cell plates
1997.2.2 Give an account of meiosis in a reproductive cell (Diagrams not necessary)
1996.1.8
During meiosis crossing over occurs between on of the following
A. two centromeres of homologous chromosomes
B. two homologous chromosomes
C. to non-homologous chromatids
D. two homologous chromatids
1994.1.23
Which one of the following is true of the products of gametogenesis in flowering plants?
A. the pollen grain is haploid
B. the synergids are diploid
C. the generative nucleus is haploid
D. the definitive nucleus is haploid
1993.1.10
when, in mitosis, does spindle formation occur?
A. anaphase
B. interphase
C. prophase
D. metaphase
1993.2.4
Without the aid of a diagram, give an account of meiosis in cells
1992.1.39
During which phase in mitosis does DNA replication and chromosomal duplication take place?
A. Anaphase
B. Metaphase
C. interphase
D. Prophase
1986.2.5
(a) Distinguish between mitosis and meiosis
(5) Describe the changes you would observe in cell during gametogenesis in male organism
Comment on the importance of meiosis in sexually reproducing organism.
1987.1.12 Figure 2 shows stages of cell division
What are the stages of cell division depicted in Fig.2 A and B?
A. Anaphase I and Anaphase II
B. Telophase I and Telophase II
C. Metaphase I and Metaphase II of meiosis
D. Metaphase and anaphase of mitosis
1987.1.28
Which of the following is a characteristic of meristematic tissues?
A. possession of small nuclei
B cell with small vacuoles
C. thin cellulose secondary walls
D. Possession of intercellular spaces
1987.1.37
One main difference between mitosis and meiosis is that
A. Diakinesis does not occur in the former.
B. zygotene does not occur in the former
C. chromosomes do not move to the equator of the spindle in the latter
D. there is no interphase at all in meiosis
1984.1.1
Which of the following event takes place during the interphase of cell division?
A. Division of the cytoplasm into equal parts
B. formation of new organelles
C. duplication of the centromere
D. Formation of spindle fibres
Monitor 13th /09/2006
State the
(a) significance of meiosis
- It ensures that the chromosome number is halved hence when the gametes with haploid number of chromosomes fuse, they form a diploid zygote thus restoring the diploid state and maintaining the species
- meiosis leads to increased variation because
(i) When haploid cells fuse at fertilization there is recombination of the parental genes
(ii) during metaphase I homologous chromosomes come together at the equator of the spindle but they separate into daughter cells independently of each other.
(ii) chiasmata and crossing of over can separate and rearrange genes located on the same chromosome.
(b) differences between mitosis and meiosis
2. What does not occur during the process of mitosis in most organisms?
A. Formation of spindle fibres
B. pairing of homologous chromosome
C. separation of chromatid
D. disintegration of nuclear membrane
3. A plant has 22 chromosomes in each of its root cells. What will be the number of chromosome in each endosperm of this plant?
A. 22
B 11
C. 33
D. 44
B
C
B
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