Meiosis

Q.

What is crossing over? Write the significance of crossing over.

Q.

What stage does crossing over occur in meiosis?

Q.

What is the difference between meiosis 1 and meiosis 2?

Q. When cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

1. Both $G_2$/M and M
2. $G_1$/S
3. $G_2$/M
4. M

Q.

"Gametes must be produced by meiosis for sexual reproduction". Why is it so?

Q.

The centriole undergoes duplication during:

1. Prophase

2. S-phase

3. Metaphase

4. G2 phase

Q. A cell has 20 chromosomes. The number of chromosomes in the daughter cells after meiosis is ___________.

1. 20
2. 40
3. 15
4. 10

Q.

Is there any relationship in the number of chromosomes of meiocytes and gametes?

Q.

In plants, meiosis takes place in

1. Anthers and ovary

2. Anthers and pollen grains

3. Ovary and ovules

4. Pollen grains and ovules

Q.

In which phase do the nuclear membrane and nucleolus disappear?

1. Telophase

2. Interphase

3. Metaphase

4. Prophase

Q. why is the template with polarity 5-->3 discontinuos in dna replication? explain.

Q.

Why is leptotene called the bouquet stage?

Q.

In meiosis, the division is

1. Both Meiosis I and Meiosis II are equational

2. Meiosis I is reductional and Meisois II is equational

3. Meiosis I is equational and Meiosis II is reductional

4. Both Meiosis I and Meiosis II are reductional

Q.

What happens in meiosis during oogenesis?

Q.

What is the main function of meiosis?

Q. The DNA content of a diploid cell in the G1 phase of the cell cycle is measured. If this DNA content is X, then the DNA content of the same cell at metaphase of meiosis I would be ________.

1. 0.5 X
2. 0.5 X
3. X
4. 2 X

Q. What is Mitosis and Meiosis? Please Explain in simple words

Q.

Can a haploid cell undergo meiosis?

Q.

What marks the beginning of the diplotene?

Q.

What is the main purpose of mitosis and meiosis?

Q. During which phase do the sister chromatids line up at the equator?

1. Prophase I
   

2. Prophase II

3. Metaphase I

4. Metaphase II

Q.

Gametes must be produced by meiosis for sexual reproduction. Why

Q. Spores are produced by mitosis in spore mother cells present in sporangia in pteridophytes.

1. False
2. True

Q. The diagram shows a cell whose diploid chromosome number is four. Which one of the following option shows correct stage of cell?

1. Telophase I of meiosis
2. Anaphase of mitosis
3. Anaphase I of meiosis
4. Anaphase II of meiosis

Q.

The plant life cycle alternates between a sporophyte and a gametophyte. Usually, in the sporophyte stage

1. Gametes are produced

2. Meiosis occurs

3. Only mitosis takes place

4. Gametophytes form

Q. What is the number of chromosomes in human germinal cells?

1. 12
2. 84
3. 23
4. 46

Q. Enumerate the various changes that occur in the nucleus of the cell during (a) prophase of mitotic division.

Q.

The figure below shows a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis

Which diagram(s) represent anaphase II of meiosis?

1. V

2. II

3. III

4. IV

Q.

Name the following.

The type of cell division which occurs in the cells of reproductive organs.

Q.

The nucleus in each cell in the stem of a plant contains 32 chromosomes.

How many chromosomes are there in the nuclei of its pollen grains?

1. 8

2. 32

3. 64

4. 16