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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.
विकल्प
True
False
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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.
संबंधित प्रश्न
Correct the following statement if there is any mistake:
Genes are specific sequences of bases on a chromosome .
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
Centromere is related to _______________
Mention the contribution of the scientist given below in the study of chromosome:
Waldeyer
Mention the contribution of the scientist given below in the study of chromosome:
Sutton and Boveri
Choose the correct answer:
Chromosomes largely consist of _______________
Choose the correct answer:
Telocentric chromosomes are _________________
How does colchicine act as mitotic poison? Is there any advantage of it?
Name the following:
The part of the cell associated with heredity.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes are the thickest and shortest in telophase.
Name the following:
Pairs of chromosomes, present in human egg cells.
Name the following:
The pattern of arrangement of genes along a chromosome.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with a suitable idea given in Column ‘I’.
| Column I | Column II |
| Genetics | Chromosomes are similar in size and shape. |
| Autosomes | The alternative forms of a gene. |
| Recessive gene | Study of laws of inheritance of characters |
| Allele | A gene that can express only when in a similar pair. |
| Homologous chromosomes | Chromosomes are other than the pair of sex chromosomes. |
Some of the chromosomes have an elongated knob-like appendages known as telomere.
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?
After a mitotic cell division, a human female cell will have ______.
Define the following term:
Chromatid
In the human male, a sperm contains autosomes and ______.
