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प्रश्न
उत्तर
Chromosomes are the thread like structures or chromatin material present inside the nucleus.
Chromosomes are so called because they take up certain basic dye and stain very rapidly. The word chromosome comes from two words "chromos" meaning colour and "soma" meaning body.
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संबंधित प्रश्न
Name the following:
The number of chromosomes present in a nerve cell of a human being.
What are genes?
Answer the following question in your own words.
What is meant by ‘chromosome’?
Choose the correct answer:
Chromosomes number is halved in ____________
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:
The term 'chromosome' was coined by ___________
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Why gametes have a haploid number of chromosomes?
Differentiate between
Chromatin and Chromosome.
Explain the Term Centrioles
Explain the Term Spindle
Multiple Choice Question:
After mitotic cell division, a female human cell will have
Name the following:
A specific part of a chromosome that determine hereditary characteristics.
Multiple Choice Question
Chromosomal aberrations are caused by:
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. |
In humans, the sex chromosome complement is
______ is a sudden permanent heritable change that can occur in the gene, in the chromosome or chromosome number.
