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प्रश्न
Define the following term:
Chromatid
उत्तर
After duplication, a chromosome has two identical sections. A chromosome is formed during cell division by the union of two chromatids.
संबंधित प्रश्न
The Chromatin material is formed forms of ______.
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 |
Expand the following biological abbreviations :
DNA
The component which is in the nuclei of cells and carries the hereditary characteristics is called ______.
State how does meiosis maintains chromosome number in a species.
Differentiate between
Cytokinesis in plant and animal cell
Explain the Term Leptotene
Name the following:
Microtubules form the bipolar spindle in which stage.
Complete the following sentence with appropriate word :
The pairing of homologous chromosomes is called _______.
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Multiple Choice Question
Chromosomal aberrations are caused by:
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?
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'.
Rewrite the correct form of the statement by changing the first or last word only:
Duplicated chromosomes remain attached at a point termed as centrosome.
