Advertisements
Advertisements
प्रश्न
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Advertisements
उत्तर
The number of chromosomes in humans is pairs/46.
APPEARS IN
संबंधित प्रश्न
Name the following:
The number of chromosomes present in a nerve cell of a human being.
What are genes?
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
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 |
State the difference between:
Chromosome and chromatid:
During the pairing of chromosomes in meiosis, the ________ chromosomes come to lie side by side.
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ____________
Mention the contribution of the scientist given below in the study of chromosome:
Strasburger
Choose the correct answer:
Telocentric chromosomes are _________________
How does colchicine act as mitotic poison? Is there any advantage of it?
State how does meiosis maintains chromosome number in a species.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Name the following:
The part of the cell associated with heredity.
Give Technical Terms
The stage at which chromosomes occurs reach the opposite poles.
Multiple Choice Question:
How many chromosomes are found in a cell of humans?
Name the following:
The number of chromosomes present in human gametes.
Name the following:
The diploid number for cell of man.
Give Technical Term:
Transmission of characters through generations.
Nullisomy is represented by ______.
