हिंदी

A V-shaped chromosome is ______.

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प्रश्न

A V-shaped chromosome is ______.

विकल्प

  • acrocentric

  • metacentric

  • telocentric

  • sub-metacentric

MCQ
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उत्तर

A V-shaped chromosome is metacentric.

Explanation:

Metacentric chromosomes have their centromere positioned exactly in the middle, dividing the chromosome into two equal arms. During the anaphase stage of cell division, as spindle fibres pull the chromosome toward the pole from this central point, both arms trail behind equally. This symmetrical movement forces the chromosome to assume a distinct V-shaped appearance.
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अध्याय 2: Structure of Chromosomes - Exercises [पृष्ठ २१]

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फ्रैंक Biology Part 2 [English] Class 10 ICSE
अध्याय 2 Structure of Chromosomes
Exercises | Q 1. (h) | पृष्ठ २१

संबंधित प्रश्न

The Chromatin material is formed forms of ______.


“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement? 


Mention whether the following statement is (T) Or (F). Give reason in support of your answer. 

The unfertilized human egg has half the number of chromosomes of the body cells. 


Choose the correct answer:
Chromosomes number is halved in _____________


Mention the contribution of the scientist given below in the study of chromosome:

Strasburger


Write a sentence of the following:
Telomere


Enumerate the various changes that occur in the nucleus of the cell during anaphase of mitotic division.


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


Explain the Term Leptotene


Explain the Term Chromosomes


Name the following:

The part of the cell associated with heredity.


Complete the following sentence with appropriate word  :

The spindle fibers are made of _______.


Complete the following sentence with appropriate word  :

Chromosomes are _________ material.


Name the following:

The number of chromosomes present in human gametes.


Complete the following sentence with appropriate word:

The number of chromosomes in humans is ________.


Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.

Column I Column II
Genetics Chromosomes are similar in size and shape.
Autosomes The alternative forms of a gene.
Recessive gene Study of laws of inheritance of characters
Allele A gene that can express only when in a similar pair.
Homologous chromosomes Chromosomes are other than the pair of sex chromosomes.

Describe the structure of sex chromosomes with the help of labelled diagram.


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


Small swellings on the surface of the chromosome are called______.


The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.


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