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☆☆☆☆☆As we learn more about genetics, this begins to look like an overly simplistic view of the concept of gene. The exact definition of the term gene is in debate at the moment, as is the use of the term at all in the future. The discovery of very short RNA's (miRNA, siRNA's) which influence gene expression (without translation into peptides) are part of this debate.
Definitions
A gene is a unit of heredity in a living organism. It is normally a stretch of DNA that codes
for a type of protein or for an RNA chain that has a function in the organism. All proteins and functional RNA chains are specified by genes. All living things depend on genes. Genes hold the information to build and maintain an organism's cells and pass genetic traits to offspring. A gene is a unit of in a living organism. It is normally a stretch of DNA that codes for a type of protein or for an RNA chain that has a function in the organism.
Genes hold the information to build and maintain an organism's cells and pass genetic traits to offspring. A gene is a part of a DNA molecule that codes for a particular trait of an organism. It provides instructions on how to make a polypeptide. For example, one gene may code for the production of tyrosinase, which is an enzyme (protein) used in the synthesis of melanin (a pigment responsible for dark colors in skin and fur).
By the traditional definition, a gene is 'transcribed' into mRNA which is then 'translated' into a protein, which will produce the desired effect in an organism's cell. Some genes may contain instructions for the production of RNA that is not translated into a protein, such as tRNA, rRNA, miRNA and siRNA.
Conclusion
In essence, a gene is a section of a DNA molecule that has a unique and specific biological function.
One of the major aspects of life is self replication, or reproduction. If cells didn't divide, then populations of organisms would not form, and evolution would be impossible. The more proximate cause is that as cells grow and ingest food, there is a limit to how big they can become before the cell wall no longer supports the cytoplasm. At or before this point, the cell must divide or it will lyse (split open) and die.
During telophase the cell membrane gets "pinched" and the orgenelles and DNA are split. following telophase is cytokinesis when the cell membrane is sealed off and the mother cell becomes two sister cells.
The final stage of meiosis or mitosis, in which the separated chromosomes reach the opposite poles of the dividing cell and the nuclei of the daughter cells form around the two sets of chromosomes.
This answer contributed by The Scientific Theory Academy of Science (STAOS)
In telophase nuclear membrane is begin to reform at both ends of the cell and spindle fibers disappear. chromosomes uncoil and return to chromatin form in preparation for Interphase. Cytokinesis coincides with this stage of mitosis.
All of this is true but a much easier answer to this question is that telophase is when a new nucleus forms around each copy of dna.
sex cells
They pull the cell membrane in.
They Split The Cell During Cytokinesis.
S Phase - period of DNA replication - 10% shorter than G1.
After G1 phase S phase occurs.
Anaphase
it would prevent tumor cells from reproducing.
in plants, a new cell wall forms to split the cell
If crossing over didn't happen during meiosis in humans, the haploid daughter cells would all have the same genes. The crossing over creates variation and causes each daughter cell to have slightly different genes.
dna in eukaryotes is located in the nucleus
mitosis only has to do with celluar reproduction
meiosis has to do with sex cells reproducing
Mitosis creates new cells that are used for development, repair, asexual reproduction and growth. Meiosis creates cells in order for organisms to reproduce sexually.
broad leaves
