Biology
The figure given alongside was shown to students of class 10 in the laboratory under a compound microscope. They were told to observe the slide, identify the stage of mitotic cell division and mention the number of chromosomes which would be found in the daughter cells. Which of the following will be the correct response?
- Anaphase, 8 chromosomes
- Metaphase, 8 chromosomes
- Anaphase, 4 chromosomes
- Telophase, 4 chromosomes
Answer
Anaphase, 4 chromosomes
Reason — During mitosis the chromosome number remains the same, and in anaphase the sister chromatids move towards opposite ends. During this phase, in animal cell, the furrow formation starts in the cell membrane at the middle by which the cytoplasm will divide after mitosis.
Related Questions
The number of histone proteins associated with the DNA in a nucleosome is:
- 6
- 8
- 4
- 1
The female gamete/egg cell of a human cell will have:
- 44 + XX chromosomes
- 44 + XY chromosomes
- 22 + X chromosomes
- 22 + Y chromosomes
The correct sequence of the following four major steps of karyokinesis during mitosis is :
(I) Chromatids convert into chromatin fibres.
(II) Chromatin fibres change to chromosomes.
(III) Chromosomes split into sister chromatids.
(IV) Chromatids move to opposite poles.
- (I), (II), (III), (IV)
- (II), (III), (IV), (I)
- (III), (II), (IV), (I)
- (IV), (I), (II), (III)
Assertion (A): Both centromere and centrosome are parts of chromosome.
Reason (R): The centromere is the region where spindle fibres attach, while the centrosome helps in the formation of spindle fibres.
- Both A and R are True.
- Both A and R are False.
- A is True and R is False.
- A is False and R is True.