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प्रश्न
Give a reason for the following:
Gametes must be produced by meiosis for sexual reproduction.
उत्तर
Meiosis is a type of cell division that reduces the chromosome number by half, necessitating the production of gametes for sexual reproduction. Gametes are haploid cells, which means that they contain half the number of chromosomes present in diploid cells (such as somatic cells). During fertilisation, the resulting zygote has the full diploid chromosome number when two gametes (sperm and egg) with half the chromosome number each fuse. Variation in the population is a result of the genetic diversity that is necessary for progeny to inherit a distinctive combination of genetic material from both parents.
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संबंधित प्रश्न
Choose the correct answer:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
Chromosome is most coiled at (in mitosis) ____________
Choose the correct answer:
If after karyokinesis, cytokinesis does not occur, then result would be _____________
Mention the contribution of the scientist given below in the study of chromosome:
Balbiani
Mention the contribution of the scientist given below in the study of chromosome:
Waldeyer
Choose the correct answer:
Chromosomes are thin and thread like at __________
What are chromosomes?
Enumerate the various changes that occur in the nucleus of the cell during anaphase of mitotic division.
Why gametes have a haploid number of chromosomes?
What is the importance of meiosis?
Multiple Choice Question:
After mitotic cell division, a female human cell will have
State the Location: Polytene chromosome
Name the following:
The diploid number for cell of man.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
Explain the structure of chromosomes with labelled diagram.
The thin thread-like structures found in the nucleus of each cell are called ______.
Identify the TRUE statements with respect to aneuploidy.
- When the chromosome number is not the exact multiple of the haploid set, it is described as aneuploidy.
- Aneuploidy is only addition of one or more chromosome(s) to the total number of chromosomes in a cell.
- Aneuploidy is further classified as hypoploidy and hyperploidy.
After a mitotic cell division, a human female cell will have ______.
