Chifukwa chiyani anyani ali ndi ma chromosome 48 ndipo anthu 46?
Chifukwa chiyani anyani ali ndi ma chromosome 48 ndipo anthu 46?
Anonim

Anthu ali ndi ma chromosomes 46, pa chimpanzi, gorila, ndi orangutan ndi 48. Kusiyana kwakukulu kwa karyotypic uku kudayamba chifukwa cha kuphatikizika kwa makolo awiri ma chromosome kupanga chromosome ya munthu 2 ndi kutsekedwa kotsatira kwa imodzi mwama centromeres awiri oyambirira (Yunis ndi Prakash 1982).

Chifukwa chiyani anyani ali ndi ma chromosomes 48?

Anthu kukhala diploid yodziwika bwino chromosome chiwerengero cha 2N=46 pamene anyani ena aakulu (oranguta, gorila, ndi anyani) onse ndi 2N=48. Mkulu wa metacentric Chromosome 2 ya Homo ikuwoneka ngati chifukwa cha kuphatikizika pakati pa ma telocentric ang'onoang'ono awiri ma chromosome amapezeka mu Anyani Akuluakulu ena.

Kachiwiri, kodi anyani ndi anthu ali ndi chiwerengero chofanana cha ma chromosome? Munthu ndi ma chromosomes a chimpanzi zofanana kwambiri. Kusiyana kwakukulu ndiko anthu ali nazo peyala imodzi yochepa ma chromosome kuposa kuchita zina zazikulu anyani. Anthu atero 23 pawiri ma chromosome ndi zina zazikulu anyani ali 24 pawiri ma chromosome.

Mwachidule, kodi anthu anapeza bwanji ma chromosome 46?

Anthu, mofanana ndi zamoyo zina zambiri, zimatchedwa 'diploid'. Izi ndichifukwa chathu ma chromosome kukhalapo awiriawiri ofanana - ndi imodzi chromosome gulu lililonse lotengera kwa kholo lililonse lobadwa nalo. Selo iliyonse mu munthu thupi lili 23 awiriawiri wotere ma chromosome; nambala yathu ya diploid ndiye 46, nambala yathu ya 'haploid' 23.

Chifukwa chiyani pali kusiyana pakati pa ma chromosome pakati pa anthu ndi anyani akulu?

Makamaka, limafotokoza zimenezo anthu kukhala ndi mmodzi wocheperapo chromosome awiri m'maselo awo kuposa anyani, chifukwa cha kusintha komwe kumachitika mu nambala ya chromosome 2 zomwe zinayambitsa ziwiri ma chromosome kusanganikirana mu umodzi.

Yotchuka ndi mutu