Mitosis: (1 point)
takes one cell and replicates it into two
genetically identical cells.
takes one cell and replicates it into two
genetically unique cells.
takes two cells, one from each parent, and
replicates it into four genetically unique
cells.
takes one cell and replicates it into four
cells, each with half of the original cell's
genetic information.
takes one cell and replicates it into two genetically identical cells.
Raul has scraped his knee and noticed that after a
week it had almost completely healed. Raul wondered
how the skin was able to repair itself while looking
exactly the same as his non-injured skin. In 3-5
sentences explain how mitosis plays a role in healing
skin after injury and is able to maintain the look of the
existing, non-injured skin. (4 points)
Mitosis plays a crucial role in healing the skin after injury. When the skin is damaged, specialized cells called fibroblasts and keratinocytes begin to divide through mitosis. This process allows for the rapid production of new cells to replace the damaged ones. The newly generated cells go through the same stages of growth and division as the existing skin cells, resulting in the formation of new tissue that is identical in appearance to the non-injured skin. This ensures that the healed skin maintains the same look as the surrounding tissue.
In three to five sentences, explain the advantage of
keeping some DNA needed by mitochondria in the
cell’s nucleus and some in the mitochondria itself.
Keeping some DNA needed by mitochondria in the cell's nucleus and some in the mitochondria itself provides several advantages. First, having DNA in the nucleus allows for better control and regulation of gene expression. The nuclear DNA can be transcribed and translated to produce proteins needed by the mitochondria. Second, having mitochondrial DNA allows for independent replication and maintenance of mitochondrial functions. It also allows for rapid and localized responses to environmental changes without relying on nuclear gene expression. Additionally, the separation of DNA between the nucleus and mitochondria minimizes the risk of DNA damage to both compartments, ensuring the overall integrity of the cell's genetic material.
In three to five sentences, describe the advantages
and disadvantages of these maps in modeling mitosis
Advantages of using maps in modeling mitosis include the ability to visually represent the complex and dynamic process of cell division. Maps can help identify specific stages and events during mitosis, allowing for a clearer understanding of the sequence of events. They also aid in communication and knowledge transfer, as models can be shared and easily understood by others. However, a limitation is that maps may oversimplify the process and fail to capture all the intricacies and variations that can occur in mitosis. Maps might not account for the different factors and regulatory mechanisms that can influence mitotic progression, limiting their accuracy and applicability in certain contexts.
In a certain population of rabbits, the ratio of the
phenotypes of brown fur and white fur is 1:1. What is the
frequency of the white fur trait in the rabbit population?
(1 point)
50%
1%
25%
100%
The frequency of the white fur trait in the rabbit population would be 50%. This is because in the given ratio of 1:1, there is an equal number of rabbits with brown fur and rabbits with white fur. Therefore, out of the total population, half of the rabbits would have white fur, resulting in a frequency of 50%.
Mitosis is a process of cell division that allows a single cell to produce two identical daughter cells. It is a fundamental process in the growth, development, and repair of multicellular organisms. During mitosis, the genetic material or DNA within the cell is replicated and then evenly distributed into the two daughter cells. This ensures that each daughter cell receives an identical set of chromosomes as the parent cell.
Out of the four options you provided, the correct answer for the process of mitosis is:
- Mitosis takes one cell and replicates it into two genetically identical cells.
To determine the correct answer, we need to understand the basic steps of mitosis. Here are the key steps involved in mitosis:
1. Interphase: The cell prepares for division by growing and duplicating its organelles and DNA.
2. Prophase: The chromatin (uncoiled DNA) condenses into visible chromosomes. The nuclear envelope breaks down.
3. Metaphase: The chromosomes line up in the middle of the cell along the metaphase plate.
4. Anaphase: The sister chromatids separate and move towards opposite ends of the cell.
5. Telophase: The chromosomes reach the opposite poles, and the nuclear envelope reforms.
6. Cytokinesis: The cell physically divides into two daughter cells, each with a complete set of chromosomes.
During mitosis, the genetic information is accurately replicated and divided between the two daughter cells, ensuring they are genetically identical to the parent cell. This means that the correct answer is the first option: mitosis takes one cell and replicates it into two genetically identical cells.