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प्रश्न
Multiple Choice Question:
How many chromosomes are found in a cell of humans?
पर्याय
20 Pairs
46 Pairs
23 Pairs
46 Pairs
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उत्तर
46 Pairs
APPEARS IN
संबंधित प्रश्न
Name the following:
The number of chromosomes present in a nerve cell of a human being.
Match the events given in column A with the phase in mitotic cell division in column B.
| Column ‘A’ | Column ‘B’ | ||
| 1. | Chromosomes get arranged in a horizontal plane at the equator. |
a. | Anaphase |
| 2. | Daughter chromosomes move to the opposite poles of a spindle |
b. | Prophase |
| 3. | Chromosomes become visible as fine, long threads. |
c. | Telophase |
| 4. | Chromosomes lose their distinctiveness and gradually become transformed into a chromatin network. |
d. | Metaphase |
Choose the correct answer:
Centromere is related to ________
Choose the correct answer:
A 'V' shaped chromosomes has to _____________
Choose the correct answer:
Sex of an individual is determined by ____________
What is the importance of meiosis in creating variations?
Give Reasons for the following
The meiosis is called reductional division
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
Name the following:
Microtubules form the bipolar spindle in which stage.
Name the following:
The part of the cell associated with heredity.
Give Technical Terms
The stage at which synapsis in chromosomes to form bivalents.
Complete the following sentence with appropriate word :
The spindle fibers are made of _______.
Write the functional activity of the following structure:
Spindle fibers
Name the following:
The diploid number for cell of man.
Explain the structure of chromosomes with labelled diagram.
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?
