Question

Установите правильную последовательность этапов онтогенеза 1 деспирализация хромосом2 расхождение хроматид к полюсам клетки3. синтез белков, рост клетки4. спирализация хромосома интерфазаб профазав метафазаг анафазад телофаза​

Answer 1

1.б

2.г

3.а

4.в

вроде правильно

Answer 2

1)б
2)г
3)а
4)в
............

Answer 3

Correct Sequence of Ontogenesis Stages

The correct sequence of ontogenesis stages is as follows:

1. Despiralization of Chromosomes: During this stage, the tightly coiled chromosomes become less condensed and start to unwind. This allows for easier access to the genetic information stored in the DNA.

2. Separation of Chromatids to Cell Poles: In this stage, the sister chromatids, which are the replicated copies of each chromosome, separate and move towards opposite poles of the cell. This process ensures that each daughter cell receives a complete set of chromosomes during cell division.

3. Protein Synthesis and Cell Growth: After the separation of chromatids, the cell enters a phase of protein synthesis and cell growth. During this stage, the cell synthesizes new proteins and increases in size to prepare for the next stages of ontogenesis.

4. Spiralization of Chromosomes in Interphase: Following protein synthesis and cell growth, the chromosomes start to spiralize again during interphase. Interphase is the period between cell divisions when the cell prepares for the next round of division. The spiralization of chromosomes ensures that they are properly organized and condensed before entering the next division phase.

5. Prophase: During prophase, the chromosomes become highly condensed and visible under a microscope. The nuclear envelope starts to break down, and the mitotic spindle, a structure made of microtubules, begins to form.

6. Metaphase: In metaphase, the chromosomes align along the equator of the cell. The mitotic spindle fibers attach to the centromeres of the chromosomes, ensuring their proper alignment for subsequent separation.

7. Anaphase: During anaphase, the sister chromatids separate and move towards opposite poles of the cell. This ensures that each daughter cell receives a complete set of chromosomes.

8. Telophase: Telophase is the final stage of cell division. The chromosomes reach the opposite poles of the cell, and new nuclear envelopes start to form around them. The cell begins to divide into two daughter cells through a process called cytokinesis.

Please note that the stages mentioned above represent a generalized sequence of ontogenesis and may vary depending on the specific organism or cell type.