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Name the Following : the Number of Chromosomes Present in a Nerve Cell of a Human Being. - Biology

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Question

Name the following:

The number of chromosomes present in a nerve cell of a human being.

One Word/Term Answer
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Solution

46 (23 pairs)

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2017-2018 (March) Set 1

RELATED QUESTIONS

Give appropriate biological or technical terms for the following :

The condition in which a pair of chromosomes carries similar alleles of a particular character.


Correct the following statement if there is any mistake:

Genes are specific sequences of bases on a chromosome .


Given below is a schematic diagram of a portion of DNA.

 

  1. How many strands are shown in the diagram?
  2. How many nucleotides have been shown in each strand?
  3. Name the parts numbered 1, 2, 3, 4 and 5 respectively.
  4. Name the DNA unit constituted by the parts 1, 2, 3 collectively.

State the difference between: 

Chromosome and chromatid:


Answer the following question in your own words. 

What is meant by ‘chromosome’? 


What do you understand by sex chromosomes?

Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________


What is the importance of meiosis?


Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.


(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.


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The stage at which the formation of chiasmata occurs.


Multiple Choice Question:

The disappearance of spindle and uncoiling of chromosomes takes place in


Multiple Choice Question

Chromosomal aberrations are caused by:


With the help of a neat labelled diagram, describe the structure of chromosome.


Define euploidy.


The centromere is found at the centre of the ______ chromosome.


The loss of one or more chromosomes in ploidy is called ______.


Explain the structure of a chromosome.


Read the following statements and select the correct option.

Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.

Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.


In the human male, a sperm contains autosomes and ______.


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