meiotically การใช้

• It sometimes occurs naturally in plants when meiotically reduced cells ( usually egg cells ) develop by parthenogenesis.
• Although spermatocytes that divide mitotically and meiotically are sensitive to radiation and cancer, spermatogonial stem cells are not.
• What is interesting is that these meiotically transmitted neocentric markers show mosaicism, which many think are due to mitotic instability.
• It is, as defined by meiotically heritable changes in gene function that cannot be explained by changes in DNA sequence ."
• In plants, this probably most often occurs from the pairing of meiotically unreduced gametes, and not by diploid diploid hybridization followed by chromosome doubling.
• The primary spermatocyte divides meiotically ( Meiosis I ) into two secondary spermatocytes; each secondary spermatocyte divides into two spermatids by Meiosis II . These develop into mature spermatozoa, also known as sperm cells.
• Another element to consider from the evolutionary stand point is that because neocentromeres are viable and can be transmitted meiotically from one generation to the next, we should ask whether or not neocentromeres play a role in species evolution.
• Not all polyploids are reproductively isolated from their parental plants, and gene flow may still occur for example through triploid hybrid x diploid matings that produce tetraploids, or matings between meiotically unreduced gametes from diploids and gametes from tetraploids.
• In "'gametic meiosis "', instead of immediately dividing " meiotically " to produce haploid cells, the zygote divides " mitotically " to produce a multicellular diploid individual or a group of more unicellular diploid cells.
• However, not all polyploids are reproductively isolated from their parental plants, and gene flow may still occur for example through triploid hybrid x diploid matings that produce tetraploids, or matings between meiotically unreduced gametes from diploids and gametes from tetraploids ( see also hybrid speciation ).