Meiosis

Q.

What happens during prophase of mitosis?

Q.

What Is Interkinesis?

Q. Consider a diploid cell that has a total of 16 chromosomes. At the end of meiosis I the cell will contain an ‘X’ number of chromosomes and a ‘Y’ number of sister chromatids. What are ‘X’ and ‘Y’?

1. X = 8; Y = 16
2. X = 8; Y = 8
3. X = 16; Y = 8
4. X = 16; Y = 16

Q.

Crossing over occurs in mitosis.

1. True
2. False

Q.

What is meiosis and where does it happen?

Q.

Which do you think is more important? Is it Meiosis or Mitosis?

Q. Mitosis is called equational division because

1. parent cell forms two daughter cells
2. both a and b
3. it occurs in all somatic cells
4. both the parent cell and daughter cell have same number of chromosomes

Q.

List the main differences between mitosis and meiosis.

Q. Differentiate between g0 and g1 phase

Q. Describe the following :

Q. Look at the figure given below. The number given inside the circle represents the number of chromosomes in the cell at that point. Fill in the blanks for (i), (ii) and (iii) using the option that fits best.

1. (i) - 40; (ii) - 20; (iii) - 10
2. (i) - 20; (ii) - 10; (iii) - 10
3. (i) - 40; (ii) - 20; (iii) - 20
4. (i) - 40; (ii) - 10; (iii) - 10

Q. Distinguish anaphase of mitosis from anaphase I of meiosis.

Q. If the megaspore mother cell in a flower forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, the egg cell and central cell formed, respectively, would be

1. diploid and haploid
2. diploid and tetraploid
3. haploid and diploid
4. triploid and diploid

Q. what is gametophytic and saprophytic stage in plants life cycle.

Q. Most multicellular eukaryotes form gametes by

1. Parthenogenesis

2. Meiosis

3. Oncogenesis

4. Binary fission

Q.

In the figure given here certain parts are indicated by alphabets. Select the answer which contains, the correct matching of these alphabets, with the correct parts.

1. A = Spindle, B = Kinetochore, C = Chromosomes

2. A = Kinetochore, B = Spindle, C = Chromosomes

3. A = Chromosomes, B = Spindle, C = Kinetochore

4. A = Kinetochore, B = Chromosomes, C = Spindle

Q. Meiosis is characterised by

1. Reduction division
2. Equal division
3. Both reduction and equal division
4. None of the above

Q.

what is the difference between cell cycle and cell division.

Q.

Early anaphase is characterized by the

1. Contraction of continuous fibres

2. Separation of sister chromatids

3. Divisions of centromere in each chromosome

4. All of these

Q.

What happens to the microtubules at metaphase II ?

Q.

Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.

Q. in bryophytes why do zygote do not undergo reduction division immediately?

Q. Arrange the following events of meiosis in the correct order.
(i) Crossing over
(ii) Synapsis
(iii) Terminalisation of chiasmata
(iv) Disappearance of nucleolus

1. (ii), (i), (iii), (iv)
2. (i), (ii), (iii), (iv)
3. (ii), (iii), (iv), (i)
4. (ii), (i), (iv), (iii)

Q.

Distinguish anaphase of mitosis from anaphase I of meiosis.

Q. When does DNA replication take place during meiosis?

1. DNA replication occurs during meiosis
2. Before Prophase II
3. Before Prophase I
4. Both (a) and (b)