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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
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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
What is the difference between chromatin fibre and chromosome?
Fill in the blank
The _______ (s) are surrounded by radiating rays called aster
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ________________
What is the importance of meiosis in creating variations?
Differentiate between
Chromatin and Chromosome.
Explain the Term Leptotene
Explain the Term Chromosomes
Complete the following sentence with appropriate word :
Chromosomes are _________ material.
Write the functional activity of the following structure:
Chromosome
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
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. |
With the help of a neat labelled diagram, describe the structure of chromosome.
Long answer type question.
Describe the different types of chromosomes.
Explain the structure of a chromosome.
The sex of the newborn child is a matter of chance and neither of the parents may be considered responsible for it. What would be the possible fusion of gametes to determine the sex of the child?
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
