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प्रश्न
What is the importance of meiosis in creating variations?
उत्तर
During meiosis, the exchange of chromosomal material takes place between the non-sister chromatids forming new combinations. These new combinations give rise to variations which result in the evolution of species and even in the origin of new species.
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संबंधित प्रश्न
Answer the following question in your own words.
What is meant by ‘chromosome’?
Choose the correct answer:
Chromosomes appear at equator in ____________
Choose the correct answer:
Chromosomes number is halved in _____________
Choose the correct answer:
Minimum coiling in chromosome is at ________________
Choose the correct answer:
Chromosomes are thin and thread like at __________
Choose the correct answer:
Chromosome number of man is _____________
Complete the following sentence with appropriate word :
Polytene chromosomes are found in _________ of fly larvae.
State the Location: Chromosomes
Complete the following sentence with appropriate word:
The number of chromosomes in humans is ________.
Multiple Choice Question
Chromosomal aberrations are caused by:
In humans, the sex chromosome complement is
Explain the structure of chromosomes with labelled diagram.
The centromere is found at the centre of the ______ chromosome.
The thin thread-like structures found in the nucleus of each cell are called ______.
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?
In higher unisexual animals, one pair of chromosomes is not identical in two sexes. It is called as ______.
Small swellings on the surface of the chromosome are called______.
