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प्रश्न
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
उत्तर
The number of chromosomes in humans is pairs/46.
APPEARS IN
संबंधित प्रश्न
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:
If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.
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.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Centromere is related to _______________
Choose the correct answer:
During mitosis which of the following disintegrate ___________
Choose the correct answer:
Chromosomes number is halved in ____________
The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in ______.
What is the importance of meiosis in creating variations?
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
Explain the Term Spindle
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Name the following:
The number of chromosomes present in human gametes.
Long answer type question.
Describe the different types of chromosomes.
The region of the chromosome where the spindle fibres get attached during cell division ______
Match the following.
| 1. Autosomes | - | Trisomy 21 |
| 2. Diploid condition | - | 9 : 3 : 3 : 1 |
| 3. Allosome | - | 22 pair of chromosome |
| 4. Down’s syndrome | - | 2n |
| 5. Dihybrid ratio | - | 23rd pair of chromosome |
After a mitotic cell division, a human female cell will have ______.
Given below is a set of four term. Choose the odd one and write the category of the remaining term:
