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प्रश्न
Define the following term:
Chromosome
उत्तर
The nucleus contains most of the cell's DNA, which is organised into discrete units called chromosomes.
संबंधित प्रश्न
Synthesis phase in the cell cycle is called so, because of the synthesis of more:
A. RNA
B. RNA and proteins
C. DNA
D. Glucose
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 |
Answer the following question in your own words.
What is meant by ‘chromosome’?
Mention the contribution of the scientist given below in the study of chromosome:
Balbiani
Choose the correct answer:
The term 'chromosome' was coined by ___________
Choose the correct answer:
Sex of an individual is determined by ____________
Enumerate the various changes that occur in the nucleus of the cell during prophase.
Differentiate between
Cytokinesis in plant and animal cell
Give Technical Terms
The stage at which chromosomes occurs reach the opposite poles.
Multiple Choice Question:
The period between two successive mitotic divisions is
Name the following:
The number of chromosomes present in human gametes.
The region of the chromosome where the spindle fibres get attached during cell division ______
The loss of one or more chromosomes in ploidy is called ______.
The thin thread-like structures found in the nucleus of each cell are called ______.
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 ______
Normally, genes occur in a pair of chromosome, but genes of X and Y chromosomes shows different gene loci indicating ______.
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
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 ______.
