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3 dni temu · The percent recombination between two linked genes can be directly converted into units of genetic distance called centi- Morgans or map units. While these genetic distances are only estimates of the true physical distance between two genes, they are still extremely valuable, as we will discuss in the Applications portion of the web site.
3 dni temu · Gametes such as ova, sperm, and pollen begin as germ cells, which, like other types of cells, have two copies of each gene in their nuclei. The chromosomes composed of these matching genes are called homologs. During DNA replication, each chromosome duplicates into two attached chromatids.
5 dni temu · Crossing over, as related to genetics and genomics, refers to the exchange of DNA between paired homologous chromosomes (one from each parent) that occurs during the development of egg and sperm cells (meiosis).
5 dni temu · A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division. The resulting cells, known as daughter cells, each enter their own interphase and begin a new round of the cell cycle.
5 dni temu · Cell Communication and Cell Cycle (Mitosis, Meiosis) Both mitosis and meiosis are forms of cell division that produce daughter cells containing genetic information from the parent cell.
3 dni temu · One major organelle, the nucleus, contains the genetic information necessary for cell growth and reproduction. Each cell contains only one nucleus, whereas other types of organelles are present in multiple copies in the cellular contents, or cytoplasm.
3 dni temu · Mitosis, the process in which a cell gives rise to two genetically identical daughter cells. In unicellular organisms, cell division is the means of reproduction; in multicellular organisms, it is the means of tissue growth and maintenance. Survival of the eukaryotes depends upon interactions between many cell types, and it is essential that a ...
