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प्रश्न
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
विकल्प
Inheritance
sexual reproduction
asexual reproduction
chromosomes
DNA
RNA
gene
उत्तर
The component which is in the nuclei of cells and carries the hereditary characteristics is called a chromosome.
APPEARS IN
संबंधित प्रश्न
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong
Centrosome.Cell wall, Cell membrane, Large vacuoles
What is the difference between chromatin fibre and chromosome?
Correct the following statement if there is any mistake:
If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
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:
Chromosome is most coiled at (in mitosis) ____________
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
Choose the correct answer:
Telocentric chromosomes are _________________
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Give Reasons for the following
The meiosis is called reductional division
Explain the Term Leptotene
Name the following:
Microtubules form the bipolar spindle in which stage.
Duplicated chromosomes are joined at a point termed ______.
Name the following:
The number of chromosomes present in human gametes.
Name the following:
Pair of genes responsible for a particular characteristic.
With the help of a neat labelled diagram, describe the structure of chromosome.
Long answer type question.
Describe the different types of chromosomes.
Small swellings on the surface of the chromosome are called______.
In the human male, a sperm contains autosomes and ______.
