Advertisements
Advertisements
प्रश्न
Choose the correct answer:
Chromosomes number is halved in ____________
पर्याय
meiosis I
meiosis II
mitosis
amitosis
Advertisements
उत्तर
Chromosomes number is halved in meiosis I
APPEARS IN
संबंधित प्रश्न
Correct the following statement if there is any mistake:
Genes are specific sequences of bases on a chromosome .
What are genes?
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Chromosomes appear at equator in ____________
Differentiate between
Chromatin and Chromosome.
(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.
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?
State the Location: Chromosomes
State the Location: Polytene chromosome
Give Technical Term:
Transmission of characters through generations.
What is allosome?
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 |
Explain the structure of a chromosome.
Read the following statements and select the correct option.
Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.
Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
