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प्रश्न
State the difference between:
Chromosome and chromatid:
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उत्तर
A chromosome is an organized structure of DNA and protein found in cells. It is a single
piece of coiled DNA containing many genes, regulatory elements and other nucleotide
sequences whereas a chromatid is one of the two copies of DNA making up a duplicated
chromosome, which are joined at their centromeres, for the process of cell division (mitosis
or meiosis).
संबंधित प्रश्न
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 |
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:
Centromere is related to _______________
Choose the correct answer:
The term 'chromosome' was coined by ___________
Choose the correct answer:
Chromosomes largely consist of _______________
Enumerate the various changes that occur in the nucleus of the cell during anaphase of mitotic division.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Identify the stages of meiosven below and label them.
Explain the Term Leptotene
Explain the Term Zygotene
Explain the Term Chromosomes
Give Technical Terms
The stage at which chromosomes occurs reach the opposite poles.
Give Technical Terms
The stage at which the formation of chiasmata occurs.
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
The pattern of arrangement of genes along a chromosome.
Explain the structure of chromosomes with labelled diagram.
The number of chromosomes found in human beings is ______.
Some of the chromosomes have an elongated knob-like appendages known as telomere.
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
Define the following term:
Chromosome
