Biology, asked by yashkale1304, 4 months ago

+ The diagram given alongside represents a certain phenomenon which occurs during cell
81-83
division. Study the diagram and then answer the questions that follow:
i. Identify the structure labelled 1.
ii. Name the phenomenon represented in the diagram.
iii. What is the significance of this phenomenon?
iv. In which type of cell does this phenomenon occurs?
V. Differentiate between centromere and centrosome based on their function.

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Answers

Answered by bhaleraosurabhee
2

Explanation:

  1. The structure labelled in the shown diagram is Chiasmata, which is the portion of homologous chromosomes which are still attached ( in mainly pachytene/diplotene ).
  2. The phenomenon described in the diagram is of the genetic recombination which occurs in meiosis's (prophase 1) homologous chromosomes to attain genetic variation in life forms.
  3. Genetic recombination is a programmed feature of meiosis in most sexual organisms, where it ensures the proper segregation of chromosomes. Because the frequency of recombination is approximately proportional to the physical distance between markers, it provides the basis for genetic mapping. Meiosis reduces a cell's chromosome number by half, while also creating new allele combinations distributed across daughter cells through segregation and recombination. This genetic reshuffling reduces duplicate copies of the genes and features performed by a cell and all together, by an organism.
  4. This type of division mainly occurs in the germ cells/ gamete cells where two haploid cell meet and fuses to form a diploid zygote and then embryo.
  5. Please find the attached image for better understanding.

(please note that I've recently completed my 11th grade, so the answer may or may not be that much confidential. Thank you for understanding.)

                 

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