Bambancin kwayar cutar jini daga oogenesis

Hanyar haifuwa, ci gaba da kuma kara girma na kwayoyin kwayoyin halitta a cikin ilmin halitta an kira shi "gametogenesis". A wannan yanayin, tsarin nazarin halittu wanda girma yake faruwa, sannan kuma matuƙar jima'i a cikin mata, ake kira oogenesis, kuma namiji shine spermatogenesis. Duk da irin wannan kamala, suna da bambance-bambance. Bari mu dubi kyan gani kuma mu yi nazari akan matakan biyu: oogenesis da spermatogenesis.

Mene ne bambanci?

Bambanci na farko tsakanin kwayar halitta da kwayar halitta shine gaskiyar cewa baya ga mataki na haifuwa, maturation, girma, akwai kuma na hudu - horo. A wannan lokaci ne kwayoyin halitta na haihuwa sun zama nau'i na motsi, saboda haka suka samo siffar elongated, wanda ke taimakawa motsi.

Za'a iya kiran alamar ta biyu ta alama cewa a mataki na rabuwa daga sashin kwayoyin halitta na 1, 4 an samu kwayoyin jima'i nan da nan, kuma guda ɗaya daga cikin kwayoyin halitta na haihuwa ne aka shirya daga farko domin ocyte, a shirye don hadi.

Yayin da aka kwatanta bayanan 2 matakai (magani da spermatogenesis), ya kamata a lura cewa an gano nau'ikan kwayoyin jima'i a cikin mata ko da a mataki na ci gaban intrauterine, i.a. An haifi jarirai nan da nan tare da oocytes na farko tsari. Rashin ƙarewa daga cikinsu ya ƙare ne kawai da farko na balagar yarinyar. A cikin maza, duk da haka, samuwar spermatozoa na faruwa a gaba, a duk tsawon lokacin balaga.

Wani bambance-bambance a cikin kwayar cutar jini da oogenesis shine siffar cewa a cikin jikin mutum, har zuwa miliyan 30 na spermatozoa an kafa yau da kullum, kuma mata kawai tsufa 500 qwai a duk rayuwarsu.

Ya kamata a lura cewa mataki na haifuwa a yayin aiwatar da kwayar cutar kwayar cutar ta ci gaba da faruwa, yayin da a cikin oogenesis ya ƙare nan da nan bayan haihuwa.

Da yake bayani game da wannan siffar oogenesis da spermatogenesis, ina so in lura da cewa, saboda samuwa na oocytes farawa kafin haihuwar yarinya, kuma ya gama hadu da kwai kawai bayan hadi, halayen muhalli masu haɗari zai haifar da mummunan cututtuka a cikin 'ya'yan .