Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
If there are 46 chromosomes in a cell there will be 46 chromatin fibres inside the nucleus during interphase.
संबंधित प्रश्न
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.
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
During the pairing of chromosomes in meiosis, the ________ chromosomes come to lie side by side.
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
Chromosomes number is halved in _____________
What are chromosomes?
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.
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Write the functional activity of the following structure:
Chromosome
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
The thin thread-like structures found in the nucleus of each cell are called ______.
______ is a sudden permanent heritable change that can occur in the gene, in the chromosome or chromosome number.
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
Define the following term:
Chromatid
