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प्रश्न
Explain the Term Centrioles
उत्तर
Centrioles: Two tiny structures located in the cytoplasm near the nuclear envelope (a membrane that surrounds the nucleus).
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संबंधित प्रश्न
The term “chromosomes” literally means ______.
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 |
Chromosomes are mainly made up of ______.
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
What is the importance of meiosis in creating variations?
Draw a duplicate chromosome and label its part.
Complete the following sentence with appropriate word :
Polytene chromosomes are found in _________ of fly larvae.
Name the following:
The pattern of arrangement of genes along a chromosome.
With the help of a neat labelled diagram, describe the structure of chromosome.
In humans, the sex chromosome complement is
The centromere is found at the centre of the ______ chromosome.
Read the following statements and select the correct option.
Statement I: The densely packed transcriptionally active, light staining region of chromatin is known as 'Heterochromatin'.
Statement II: The loosely packed, dark staining transcriptionally inactive region of chromatin is known as 'Euchromatin'.
Generally, the recessive character is expressed only when present in a double recessive condition i.e. homozygous condition. However, a single recessive gene can express itself in human beings when the gene is present on ______
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
Define the following term:
Chromatid
Distinguish between the following pair:
Karyotype and Karyokinesis
