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प्रश्न
Explain why meiosis and gametogenesis are always interlinked?
उत्तर १
Meiosis is a process of reductional division in which the amount of genetic material is reduced. Gametogenesis is the process of the formation of gametes. Gametes produced by organisms are haploids (containing only one set of chromosomes), while the body of an organism is diploid. Therefore, for producing haploid gametes (gametogenesis), the germ cells of an organism undergo meiosis. During the process, the meiocytes of an organism undergo two successive nuclear and cell divisions with a single cycle of DNA replication to form the haploid gametes.
उत्तर २
In sexual reproducing organisms, meiosis occurs during gametogenesis to reduce the diploid number of chromosomes (2n) to haploid number of chromosomes (n) in the gametes. Thus, gametes are formed as a result of meiosis so that their chromosome number.
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संबंधित प्रश्न
Explain the significance of meiocytes in a diploid organism.
Explain the importance of syngamy and meiosis in a sexual life cycle of an organism.
Mention the ploidy of the different types of cells present in the female gametophyte of an angiosperm.
The following question(s)/statement(s) has four suggested answers. Choose the correct option in the following case.
After fertilisation, the integuments of an ovule develop into : __________.
The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote, and the cells of the seedling will be, respectively, ______.
Syngamy means ______.
Development of an egg without fertilization is called ______.
Choose the correct statement from amongst the following.
Which of the following statements is true of date palm?
Meiosis is best observed in dividing ______.
In oogamy, fertilization involves ______.
What is true for cleavage?
Maximum number of chromosomes in gametes are presented in ______.
Gamete transfer occurs through water in all of the following except:
The probability of fruit set in a self-pollinated bisexual flower of a plant is far greater than a dioecious plant. Explain.
Is the presence of large number of chromosomes in an organism a hindrance to sexual reproduction? Justify your answer by giving suitable reasons.
Which of the followings are monoecious and dioecious organisms?
| a. | Earthworm | ______ |
| b. | Chara | ______ |
| c. | Marchantia | ______ |
| d. | Cockroach | ______ |
In haploid organisms that undergo sexual reproduction, name the stage in the life cycle when meiosis occurs. Give reasons for your answer.
