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प्रश्न
Chromosomes are mainly made up of ______.
पर्याय
Inheritance
sexual reproduction
asexual reproduction
chromosomes
DNA
RNA
gene
उत्तर
Chromosomes are mainly made up of DNA.
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संबंधित प्रश्न
Choose the best option out of the four alternatives a, b, c and d
Question 1:
The number of chromosomes in a certain type of cell division is halved. This kind of cell
division occurs in.
(a) Only testis
(b) Only ovary
(c) Both ovary and testis
(d) All body cells
Mention whether the following statement is (T) Or (F). Give reason in support of your answer.
The unfertilized human egg has half the number of chromosomes of the body cells.
Why gametes have a haploid number of chromosomes?
What is the importance of meiosis in creating variations?
(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.
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Duplicated chromosomes are joined at a point termed ______.
Multiple Choice Question:
After mitotic cell division, a female human cell will have
Write the functional activity of the following structure:
Chromosomes
With the help of a neat labelled diagram, describe the structure of chromosome.
Explain the structure of chromosomes with labelled diagram.
The number of chromosomes found in human beings is ______.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
The female gamete/egg cell of a human cell will have ______.
Given below is a set of four term. Choose the odd one and write the category of the remaining term:
