Mene ne wani chromatid? ilimi chromatids

Mene ne wani chromatid? Cell division yana da muhimmanci ga rayuwar wani kwayar kwayoyin. A ƙarshe, mun duk aka halittã shi daga wani guda cell, wanda aka raba da sake. A wannan tsari, tare da core ma wasu canje faruwa a eukaryotic Kwayoyin, wanda ake kira mitosis da meiosis. Chromatids - kwafi na chromosomes da aka halitta kafin nukiliya fission.

Canzawa cikin jinsunan

Idan ya zo ga juyin halitta, bambancin kwayoyin ne abin kula ne musamman. A meiosis (aiwatar da makaman nukiliya fission) da samuwar da haploid gamete Kwayoyin - maniyyi da ovum. Bambancin kwayoyin qara a biyu main kwatance. Da fari dai, homologue chromosomes rarrabu da ka a cikin 'yar Kwayoyin, don haka akwai mutane da yawa yiwu haduwa da juna biyu da kuma na uba chromosomes. Homologue recombination (musayar jerin) shi ne na biyu hanyar ƙara da bambancin kwayoyin.

Mene ne chromatids: Definition

A lokacin cell division da duplicates ana riskar da juna a wani yankin da ake kira centromere. Da zarar alaka da 'yar'uwa chromatids rabu da juna a cikin anaphase na mitosis, kowane daga cikinsu samun wani sabon sunan -' yar chromosomes. Mene ne wani chromatid a ilmin halitta? Kimiyance magana, shi ne daya daga 2 nucleoprotein filaments kafa ta wajen maimaita chromosomes da ya auku a lokacin cell division. Su ne rabin na biyu m kofe na replicated chromosomes.

ilimi chromatids

Chromatin - a DNA da aka rauni a kusa da sunadarai, fiili a karkace zaruruwa. Shi ne daga gare su, da kuma kafa chromatid. Kafin kwafi chromosome bayyana a matsayin single-stranded chromatids. Bayan kwafi, shi ya zama saba wa duk X-dimbin yawa. Sel mutum guda yana da wani 23 chromosome nau'i-nau'i, da total number of 46 chromosomes.

ƙarshe

Chromatid kira ko dai na biyu kofe na cikin jigidar halittar DNA tare constituting wani chromosome cewa aka a baya replicated, kuma an haɗa a wani yankin da aka sani da centromere. Wannan sunan da ake amfani da idan dai wadannan guda centromeres kasance a tsaye lamba. Lokacin da chromosomes rarrabu a lokacin anaphase na meiosis ko mitosis, da filamentous chromatids zama yara chromosomes. Kawai sa, shi halves da replicated chromosomes.