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प्रश्न
What is the difference between chromatin fibre and chromosome?
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उत्तर
Chromatin fibre is unfolded, uncondensed, extended DNA. It is only visible when cell under goes division whereas chromosomes are condensed DNA and they are visible when the cell
is divided.
संबंधित प्रश्न
Chromosomes get aligned at the centre of the cell during:
A. Metaphase
B. Anaphase
C. Prophase
D. Telophase
Correct the following statement if there is any mistake:
Genes are specific sequences of bases on a chromosome .
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
Expand the following biological abbreviations :
DNA
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ________________
Choose the correct answer:
The term 'chromosome' was coined by ___________
Why gametes have a haploid number of chromosomes?
What is the importance of meiosis in creating variations?
State the Location: Polytene chromosome
Write the functional activity of the following structure:
Spindle fibers
Name the following:
The number of chromosomes present in human gametes.
Name the following:
Pair of genes responsible for a particular characteristic.
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Describe the structure of sex chromosomes with the help of labelled diagram.
Some of the chromosomes have an elongated knob-like appendages known as telomere.
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 |
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
After a mitotic cell division, a human female cell will have ______.
