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प्रश्न
Explain the Term Pachytene
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उत्तर
Pachytene: The crossing-over begins at the end of this stage.
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संबंधित प्रश्न
The diagram given below represents a certain stage of mitosis:
- Identify the stage of cell division.
- Name the parts labelled A and B.
- What is the unique feature observed in this stage?
- How many daughter cells are formed from this type of cell division?
Fill in the blank and explain the statement.
All chromosomes are arranged parallel to equatorial plane of cell in ______ phase of mitosis.
With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.
Fill in the blank:
______ is the indirect cell division.
The diagram given alongside represents a stage in cell division.
Study the same and answer the questions that follow:
(i) Identify the stage of cell division.
(ii) Name the parts labeled A,B,C and D.
(iii) What is the unique feature observed in this stage?
(iv) Where does this type of cell division usually occur?
(v) How many daughter cells are formed from this type of cell division?
(vi) Is the dividing cell shown a plant or an animal cell?
Give a reason to support your answer.
In which one of the following options the two stages of mitosis have been given in correct sequence?
Differentiate between Centrosome and centromere.
Draw a well-labelled diagram to show the anaphase stage of mitosis in plant cells having four chromosomes.
Explain the Term Cell Diakinesis
Name the following:
Mitosis takes place in which cells.
Give Technical Terms
The stage in mitosis when the nucleolus starts disappearing.
Multiple Choice Question:
Karyokinesis is the division of
Multiple Choice Question:
The nuclear membrane and nucleolus become indistinguishable during
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the terms in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| (i) Anaphase | (a) Chromosomes become arranged in a horizontal plane at the equator. |
| (ii) Prophase | (b) Daughter chromosomes move to opposite poles of the spindle. |
| (iii) Telophase | (c) Chromosomes become visible as fine, long threads. |
| (iv) Metaphase | (d) Chromosomes lose their distinctiveness and gradually become transformed into chromatin network. |
The karyotype (set of chromosomes) shown below is taken from a dividing cell in a certain individual.
(i) Is the individual male or female? Explain your answer.
(ii) How would you expect
(a) a female cell and
(b) sperm cell to differ in chromosome composition?
Explain the following figure.
Name these:
Two steps of the process Mitosis
