Advertisements
Advertisements
Question
Answer the following question in your own words.
What is meant by ‘chromosome’?
Advertisements
Solution
The structure in the nucleus of cells that carries the hereditary characteristics is called the chromosome. It is made up mainly of nucleic acids and proteins. During cell division chromosomes can be clearly seen under the compound microscope. ‘Genes’ which contain the information about hereditary characteristics in coded form are located on chromosomes. Each species has a specific number of chromosomes.
Each chromosome is made up of DNA and it appears dumbell-shaped midway during cell division. There is a constricted region on each chromosome. It is called the ‘Primary constriction’ or ‘Centromere’. This divides the chromosome into two parts. Each part is called an ‘arm’. The centromere has a specific position in each chromosome.
Organization of chromosome
APPEARS IN
RELATED QUESTIONS
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
Name the sex chromosomes in human males and females
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Centromere is related to _______________
Choose the correct answer:
Sex of an individual is determined by ____________
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes are the thickest and shortest in telophase.
Multiple Choice Question:
The disappearance of spindle and uncoiling of chromosomes takes place in
Multiple Choice Question:
After mitotic cell division, a female human cell will have
Give Technical Term:
Transmission of characters through generations.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Write the functional activity of the following structure:
Chromosomes
Give the example of X- monosomy you have studied.
The number of chromosomes found in human beings is ______.
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'.
Differentiate between X-chromosome and Y-chromosome with reference to –
- length of non-homologous regions
- type as per the position of the centromere
Small swellings on the surface of the chromosome are called______.
