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no because they just arnt
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Are all cells produced by mitosis exactly alike gene for gene?
no because they just arnt
List the gene combination and number of single chromosomes in each of the cells produced by mitosis?
2n=4 in the prophase
Why do daughter cells look alike?
The cell exactly duplicates the organelles and splits the cells directly down the middle during Cytokinesis. Also, the DNA is an exact replication of the original strand. Unless, of course, there is a mutation while the DNA is putting itself back together (a cause of cancer). So, it looks exactly the same as the original cell, only smaller, until each cell enters it's own interphase.
How do eukaryotic cells make more cells?
Cell can make more cells via two processes. The first is called mitosis: a process which creates two identical cells. Both eukaryotic and prokaryotic cells can undergo mitosis. The second is meiosis: a process which produces reproductive cells in sexually reproducing eukaryotes. When a cell becomes cancerous, one or more mechanisms in the cell that control mitosis breaks down. This occurs due to a mutation in the cell's DNA. The genes in which a cancer-causing mutation can occur are either called proto-oncogenes or tumour suppressor genes. When such a mutation occurs in a proto-oncogene they become activated and become oncogenes. The product of oncogenes promote uncontrolled mitosis, hence the name onco(cancer)-gene. Again, as the name suggests, tumour suppressor genes have some role in suppressing cancer. Tumour suppressor genes are regulators of mitosis. When a cancer causing mutation occurs in a tumour suppressor gene, the product of the gene becomes disfunctional or are not produced altogether.
What is uncontrolled mitosis called?
Cancer is the result of cell not listening to the signals telling it to stop dividing. Cancer cells have a defect in 2 genes ( a gene that allows cancer and a gene that destroys the cancer cell). As a result, the cell will keep on dividing and not do what it is suppose to do. When the mound of cancer cells are present, it is called a tumor.
After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?
After fertilization, the zygote undergoes cell division through mitosis to form a multicellular organism. This process includes the differentiation of cells into specialized types through patterns of gene expression and signaling pathways, leading to the creation of tissues and organs.
Why do the 2 daughter cells in mitosis have to divide again in meiosis?
The usual somatic gene complement number = 2N. Upon genomic replication the gene complement number is 4N. Somatic Cell division 'reduces' the number 'back to' 2N. Gametic Cells, egg and sperm, need to "divide again" in meiosis to further reduce the gene complement number down to the required 1N [again, for gametic cells only].
Why would the two cells that formed out of mitosis be different from each other?
Typically, the two cells formed from mitosis are genetically identical, as mitosis is a process of cell division that produces two daughter cells with the same DNA as the parent cell. However, they can differ in terms of size, cell organelle distribution, and gene expression, which can lead to variations in their functional roles. Environmental factors and external signals can also influence how these cells develop and behave, contributing to their differences despite their genetic similarity.
Why are DNA strands wound into the tight gene packages of chromosomes before mitosis begins?
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How are the 2 forms of a gene distributed to the offspring?
The two forms of a gene, one from each parent, are distributed to offspring during meiosis when sex cells are formed. Each parent contributes one allele of a gene to the offspring, determining the genetic make-up and traits of the offspring.
Is DNA copied exactly when new chromosomes form during mitosis?
The DNA sequence of the cell is not supposed to change during mitosis. There are actually "proof reading" and corrective enzymes to check for errors and correct them. However, sometimes a change does occur, and that change is called a mutation. Depending on which gene is affected, a mutation can have no effect or a devastating, life threatening effect, such as cancer.
When do cells control gene expression?
By limiting the length of time mRNA is available for translation. Source: Biology textbook
