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प्रश्न
What is the importance of meiosis?
उत्तर
he meiosis is important to maintain the constant number of chromosomes in a species. It also brings about variations which result in the evolution or origin of new species
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संबंधित प्रश्न
Chromosomes get aligned at the centre of the cell during:
A. Metaphase
B. Anaphase
C. Prophase
D. Telophase
Correct the following statement if there is any mistake:
Genes are specific sequences of bases on a chromosome .
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.
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:
During mitosis which of the following disintegrate ___________
Choose the correct answer:
Chromosomes number is halved in ____________
Choose the correct answer:
The term 'chromosome' was coined by ___________
Choose the correct answer:
Telocentric chromosomes are _________________
Explain the Term Centrioles
Explain the Term Spindle
Name the following:
The part of the cell associated with heredity.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Chromosomes other than sex-chromosomes are autonomous.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Very Short Answer Question.
What is allosome?
Explain the structure of chromosomes with labelled diagram.
The centromere is found at the centre of the ______ chromosome.
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?
The two non-sister chromatids of a paired chromosome are attached to each other at ______ during the process of crossing over.
