Question

Помогите, буду очень благодарен!!! Решите задачи А) Определите, какое количество хромосом и молекул ДНК будет в каждой дочерней клетке мосле митоза, ясли перед делением клетка содержала 24 хромосомы и 48 молекул ДНК. Ответ объясните. Б) Определите, какое количество хромосом и молекул ДНК будет в материнской клетке в профазе митоза, если после деления каждая дочерняя клетка имеет 6 хромосом и 6 молекул ДНК.

Answer 1

Ответ:

а 15 так как с каждой может быть максимум 4 тогда берём 4 имножаем на 48 делим на 24 и получаем ответ

б 12 потому что 6 и 6 берём по одной и получаем ответ

(это не точно)

Answer 2

Task A: Number of Chromosomes and DNA Molecules in Daughter Cells after Mitosis

To determine the number of chromosomes and DNA molecules in each daughter cell after mitosis, we need to understand the process of mitosis and how chromosomes and DNA are distributed during cell division.

Mitosis is a type of cell division that results in the formation of two genetically identical daughter cells. It consists of several stages, including prophase, metaphase, anaphase, and telophase.

During prophase, the chromosomes condense and become visible. Each chromosome consists of two sister chromatids, which are identical copies of the DNA molecule. The DNA molecules replicate during the S phase of the cell cycle, resulting in two identical DNA molecules per chromosome.

In metaphase, the chromosomes align at the center of the cell. During anaphase, the sister chromatids separate and move to opposite poles of the cell. Finally, during telophase, the nuclear envelope reforms around the separated chromatids, and the cell undergoes cytokinesis, resulting in two daughter cells.

Now, let's apply this knowledge to the given scenario.

The parent cell initially contains 24 chromosomes and 48 DNA molecules. During mitosis, the chromosomes replicate, resulting in two identical sister chromatids per chromosome. Therefore, the parent cell would have 48 sister chromatids (2 sister chromatids per chromosome x 24 chromosomes).

During anaphase, the sister chromatids separate and move to opposite poles of the cell. As a result, each daughter cell receives an equal number of sister chromatids. Therefore, each daughter cell would receive 24 sister chromatids.

Since each sister chromatid corresponds to one DNA molecule, the number of DNA molecules in each daughter cell would also be 24.

To summarize: - Each daughter cell after mitosis would contain 24 chromosomes and 24 DNA molecules.

Task B: Number of Chromosomes and DNA Molecules in the Mother Cell during Prophase of Mitosis

In prophase of mitosis, the chromosomes condense and become visible. Each chromosome consists of two sister chromatids, which are identical copies of the DNA molecule.

Given that each daughter cell after division has 6 chromosomes and 6 DNA molecules, we can infer that the mother cell also had 6 chromosomes and 6 DNA molecules during prophase.

To summarize: - The mother cell in prophase of mitosis would contain 6 chromosomes and 6 DNA molecules.

Please let me know if there is anything else I can help you with!