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प्रश्न
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.
पर्याय
True
False
उत्तर
True
All types of human cells, have 46 chromosomes. The only type of cell which does not have 46 chromosomes are the sex cells, which have only half of the number, so they have 23 chromosomes. The egg cell is a sex cell (found in female). So it must have 23 chromosomes.
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संबंधित 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.
Chromosomes are mainly made up of ______.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Chromosomes number is halved in ____________
Mention the contribution of the scientist given below in the study of chromosome:
Balbiani
Mention the contribution of the scientist given below in the study of chromosome:
Waldeyer
Label the lettered parts of the given figure and answer the following questions:
(i) What does this diagram represent?
(ii) What is the importance of'd'?
(iii) What are the 'staining' properties of 'b' and 'c'?
(iv) Who gave the term used for this structure today?
(v) What is a?
(vi) Is 'e' present in all chromosomes?
Choose the correct answer:
Sex of an individual is determined by ____________
Name the following:
Cells having a single set of chromosomes.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
With the help of a neat labelled diagram, describe the structure of chromosome.
In humans, the sex chromosome complement is
Give the example of X- monosomy you have studied.
Explain the structure of chromosomes with labelled diagram.
Small swellings on the surface of the chromosome are called______.
After a mitotic cell division, a human female cell will have ______.
The female gamete/egg cell of a human cell will have ______.
Rewrite the correct form of the statement by changing the first or last word only:
Duplicated chromosomes remain attached at a point termed as centrosome.
Distinguish between the following pair:
Karyotype and Karyokinesis
