Question

1.Which of the following rows lists the cell cycle in the correct sequence?

a) interphase, metaphase, prophase, telophase, anaphase, cytokinesis

b) interphase, prophase, metaphase, anaphase, telophase, cytokinesis

c) interphase, G1, S, G2, mitosis, cytokinesis

d) prophase, metaphase, anaphase, telophase

2. Descriptions of some structures involved in cell division

-arrangements of strained chromosomes into homologous pairs from longest to shortest

-strands of DNA tightly coiled around histones

-a specialized region on chromosomes where sister chromarids are joined together

-condensed DNA

Match each description with the correct structure listed below

-chromosome

-chromatin

-karyotype

-centromere

3. What is the designation for a gamete with the one copy of each homologous chromosome?

a)2n

b)46 chromosomes

c)3n

d)n

4.The stage of the cell cycle most cycle affected by drugs that prevents DNA replication is _1_ and the type of division that cancer cells use to divide is _2_

a)

Stage (1)	Type of Division (2)
S	meiosis

b)

Stage (1)	Type of Division (2)
G1	meiosis

c)

Stage (1)	Type of Division (2)
G1	mitosis

d)

Stage (1)	Type of Division (2)
S	Mitosis

5.A diploid organism has 18 chromosomes in its skin cells. Which of the following correctly describes the ploidy of this organism?

a) all autosomal cells contains nine chromosomes

b)2n=36 and n=18

c) all gametes contains nine pairs of chromosomes

d)2n=18 and n=9

Answer 1

1-c

2-karotype

chromatin

centromere

chromosome

3- d

4-d

5-d

note- the cell in mitosis divide and form equal number of chromosome 2n in daughter cell which is regular ploidy of cell. The cell become diploid once it divide by meiosis and reduce its ploidy by n .
the chromosome is condensed form of dna which contain histone along with it.
interphase have G1,S,G2 phase

mitosis has prophase metaphase anaphase and telophase

after which cell divide by cytokinesis.