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प्रश्न
State how does meiosis maintains chromosome number in a species.
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उत्तर
The gametes are formed by meiosis. During meiosis the number of chromosomes is reduced to half i.e. the gametes contain haploid number of chromosomes. The male and female gametes fuse to form a diploid zygote. In this way meiosis maintains chromosome number in a species.
संबंधित प्रश्न
Chromosomes get aligned at the center of the cell during ______.
The Chromatin material is formed forms of ______.
The term “chromosomes” literally means ______.
What are genes?
Humans have 46 chromosomes. Their sperms and eggs will have ______ chromosomes each.
Choose the correct answer:
Centromere is related to _______________
Telocentric chromosomes are ______.
A V-shaped chromosome is ______.
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 ______.
Differentiate between
Chromatin and Chromosome.
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.
Identify the odd one:-
Define euploidy.
Explain the structure of chromosomes with labelled diagram.
The loss of one or more chromosomes in ploidy is called ______.
Match the following.
| 1. Autosomes | - | Trisomy 21 |
| 2. Diploid condition | - | 9 : 3 : 3 : 1 |
| 3. Allosome | - | 22 pair of chromosome |
| 4. Down’s syndrome | - | 2n |
| 5. Dihybrid ratio | - | 23rd pair of 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?
Distinguish between the following pair:
Karyotype and Karyokinesis
