Advertisements
Advertisements
प्रश्न
Multiple Choice Question
Chromosomal aberrations are caused by:
विकल्प
Change in the structure of the gene.
Change in the number of chromosomes.
Change in the arrangement or position of genes.
Change in the number or arrangement of genes in the chromosome.
उत्तर
Change in the number or arrangement of genes in the chromosome.
APPEARS IN
संबंधित प्रश्न
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong
Centrosome.Cell wall, Cell membrane, Large vacuoles
Given below is a schematic diagram of a portion of DNA.
- How many strands are shown in the diagram?
- How many nucleotides have been shown in each strand?
- Name the parts numbered 1, 2, 3, 4 and 5 respectively.
- Name the DNA unit constituted by the parts 1, 2, 3 collectively.
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:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
Chromosomes number is halved in ____________
Mention the contribution of the scientist given below in the study of chromosome:
Waldeyer
Give Reasons for the following
Chromosomes are the carriers of heredity.
Differentiate between
Gametic meiosis and Zygotic meiosis.
Give Technical Terms
The stage when sister chromosomes separate from their paired condition.
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
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
State the Location: Polytene chromosome
Write the functional activity of the following structure:
Chromosome
Name the following:
Pairs of chromosomes, present in human egg cells.
The centromere is found at the centre of the ______ chromosome.
Small swellings on the surface of the chromosome are called______.
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
The chromosomes are duplicated in ______.
