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प्रश्न
Answer the following question in your own words.
What is meant by ‘chromosome’?
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उत्तर
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
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संबंधित प्रश्न
What is the number of chromosomes in the gametes of human beings?
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
During the pairing of chromosomes in meiosis, the ________ chromosomes come to lie side by side.
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
If after karyokinesis, cytokinesis does not occur, then result would be _____________
Choose the correct answer:
Sex of an individual is determined by ____________
The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in ______.
Explain the Term Leptotene
Give Technical Terms
The phase of meiosis at which homologous chromosomes are separated.
Long answer type question.
Describe the different types of chromosomes.
In humans, the sex chromosome complement is
The loss of one or more chromosomes in ploidy is called ______.
What' does 'P' and 'Q' represent in the following diagram of X and Y chromosomes? Select the correct option representing, its appropriate description.
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'.
Which of the following is TRUE with respect to the genes which inherit together during crossing over?
A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?
In the human male, a sperm contains autosomes and ______.
