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प्रश्न
Chromosomes are mainly made up of ______.
विकल्प
Inheritance
sexual reproduction
asexual reproduction
chromosomes
DNA
RNA
gene
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उत्तर
Chromosomes are mainly made up of DNA.
APPEARS IN
संबंधित प्रश्न
State the exact location of the Centromere
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.
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
State the difference between:
Chromosome and chromatid
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.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
The term 'chromosome' was coined by ___________
Choose the correct answer:
Chromosomes are thin and thread like at __________
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Explain the Term Spindle
State the Location: Polytene chromosome
Write the functional activity of the following structure:
Chromosome
Identify the odd one:-
The loss of one or more chromosomes in ploidy is called ______.
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
Define Aneuploidy.
Which of the following statements are correct?
- X chromosome has large amount of euchromatin.
- heterochromatin is genetically inert.
- Both X and Y chromosomes are homologous.
- Crossing over does not take place in sex chromosomes in female.
Choose the correct option.
