maintains chromosome number throughout generations
causes genetic recombination
causes genetic variation
Meiosis is a type of cell division in which one cell divides to form four daughter cells, each carrying exactly half the chromosomal number of the parent cell.
It is mainly used in the formation of gametes in organisms which reproduce sexually.
The fusion of gametes restores the original chromosome number. Thus, it helps in maintaining the chromosome number throughout generations. In absence of meiosis, the chromosome number would have doubled after each fertilization event or after each generation.
In addition, events like random segregation of chromosomes and crossing over cause genetic recombination as well as genetic variation.
Meiosis is the process of cell division by which involving gametes. Cell division is just the same for sperm and egg cells, but they have distinguishable descriptions and labels in the process. Spermatogenesis is for the males’ sperm cells and oogenesis is the process for females’ egg cells. The cell division of meiosis involves the two phases, respectively meiosis I and meiosis II. Meiosis I like mitosis is the cell division that produces diploid cells<span>. These diploid cells are cells that contain a complete pair of chromosomes which is 46. The result is two diploid cells after the first meiosis. To provide clear explanation, in contrast haploid cells only contain 23 chromosomes and are created after meiosis II which is 4 in number. </span>
Mutation is the process whereby some organisms possessed some characteristics that make them to be resistance to certain stimuli.
In this case,some bacteria have become resistance to chemicals or drugs to the possession of some things or features during development. These things make them different from other strains of that same bacteria.
It will not unless it contains as much energy as the cup of tea. So a tiny spark may be at 1,000 Celsius but a whole cup of tea at 90 Celsius will deliver far more heat (energy) to the skin as the spark.
Humoral immunity protects the body against extracellular pathogens and their toxins. Cell-mediated immunity protects the body against intracellular pathogens. Recognises pathogens in circulating in blood or lymph.
celluler immunity is very specific compared with humoral
