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Mitosis cannot occur until the genetic material inside of a cell has been copied. Where in the cell is this genetic material located?
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Body cell mutations cannot be passed on to offspring. This is because body cells do not contribute genetic material to?
sex cells
Why does crossing-over not occur in mitosis?
well from what i understand mitosis is just the replication of a cell, a cell divides into two cells and it is not being effected by any other cell so crossing over cant occur Crossing over occurs in meiosis to create diversity in the genetic material so the offspring is neither identical to father or mother. in mitosis it does not occur because the parent cell is making an identical copy of itself, so the DNA does not need to vary.
What viruses cannot?
They can not reproduce without a host as reproductive vector. They have no metabolism and do not preform cellular functions. Viruses are genetic material enclosed in a protein capsid.
Lost neurons cannot be replaced because mature neurons cannot?
undergo mitosis.
Why are diploid cells in sexual reproduction important?
Sexual reproduction results in the formation of a new individual by two gametes uniting. Typically the gametes are a sperm and an egg. The sperm has the genetic information of the male, and the egg has the genetic information of the female. When the sperm joins with the egg, they are called a zygote and their genetic information combine via mitosis. At the end of mitosis, cytokinesis takes place, which is two daughter cells being formed that each have 46 chromosomes. Each new cell undergoes mitosis repeatedly until a new individual is formed. Sexual reproduction absolutely cannot take place without cell division.
How do viruses have genetic material but they are not alive?
Viruses are not considered alive because they cannot reproduce on their own. They must invade another cell or bacteria and implant their genetic material into that organism's genome in order to replicate.
What would happen if the nucleus didn't have genetic materials?
A cell cannot function without genetic material (with the exception of red blood cells, which do function without genetic material - all they have to do is to contain hemoglobin and float in the blood as it circulates). However, in organisms called prokaryotes the genetic information is not present in the nucleus but in the cytoplasm. This is possible because their genetic material is very simple and does not need the nucleus to protect it from harm.
What can stop cancer cells from dividing?
There are a number of responses to this question: * If a single-celled organism, then it cannot grow because as the name suggests, it can only grow to one cell. * If there are no centrioles, because the cell cannot produce the spindles neccasary for the chromosomes to line up and so cannot reproduce. * If there is no genetic material (chromosomes/chromatin), because it won't reproduce, because it needs genetic material to make an identical copy and so go through the process of interphase and mitosis to make a new cell and grow.
Body cell mutations cannot be passed on to offspring. This is because body cells do not contribute genetic material to?
sex cells
Can you give a sentence using mitosis?
I cannot use mitosis in a sentence.
Why is low genetic variation a problem?
Low Genetic variationis the raw material of evolution. Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction.
How are the discoveries of DNA important to genetics?
Genetics is the science of DNA, heredity, etc. The discovery of DNA marked the starting point of modern genetics.
Do only animals undergo mitosis?
noEvery organism with a nucleus can undergo mitosis. Prokariyotes cannot undergo mitosis
Why meiosis is called modified mitosis?
Meiosis is very similar to mitosis. Meiosis produces two "half-cells" after the first cell division. Mitosis, however produces two fully genetically capable cells. After mitosis, the cell products can reproduce by themselves. Meiosis is a "modified" version of mitosis, meant for genetic diversity. Mitosis probably existed way before meiosis, simply because it is easier to execute. Meiosis produces what is called a gamete. These gametes, or 'sex cells' cannot reproduce by themselves. These half-cells are meant to be combined with the complementary gamete (egg with sperm) to maximize genetic diversity and promote evolution. Mitosis is the simplified version of meiosis, and meiosis is the "modified" mitosis. You often find mitosis in simple organisms, meant solely for reproduction purposes. Meiosis is more common in evolutionarily advanced organisms, such as mammals.
Why does crossing-over not occur in mitosis?
well from what i understand mitosis is just the replication of a cell, a cell divides into two cells and it is not being effected by any other cell so crossing over cant occur Crossing over occurs in meiosis to create diversity in the genetic material so the offspring is neither identical to father or mother. in mitosis it does not occur because the parent cell is making an identical copy of itself, so the DNA does not need to vary.
Does DNA respires?
No, DNA does not respire. It is simply a macromolecule, with a function to serve as a medium for transfer of genetic material. It is not an organism itself and hence cannot respire.
What viruses cannot?
They can not reproduce without a host as reproductive vector. They have no metabolism and do not preform cellular functions. Viruses are genetic material enclosed in a protein capsid.
