Genetic balance theory yog dab tsi?
Genetic balance theory yog dab tsi?

Video: Genetic balance theory yog dab tsi?

Video: Genetic balance theory yog dab tsi?
Video: Saum neej tsis yeej hauv dab tsis tseg.9/10/2018 2024, Kaum ib hlis
Anonim

Cov kev xav ntawm genic balance muab los ntawm Calvin Bridges (1926) hais tias tsis yog XY chromosomes, kev sib deev yog txiav txim los ntawm kev sib deev. genic balance los yog piv ntawm X-chromosomes thiab autosome genomes. Nws txhais tau hais tias kev qhia ntawm txiv neej tsis yog tswj los ntawm Y-chromosome tab sis yog hloov chaw ntawm autosomes.

Tom qab ntawd, ib tug kuj yuav nug, Gene tshuav nyiaj li cas?

Taw qhia. Cov Gene Balance Hypothesis posits uas hloov cov stoichiometry ntawm cov tswv cuab ntawm ntau subunit complexes yuav cuam tshuam rau kev ua haujlwm ntawm tag nrho raws li qhov tshwm sim ntawm kinetics thiab hom kev sib dhos (Birchler li al., 2005; Birchler & Veitia, 2007) (Fig. 1).

Tsis tas li ntawd, kev sib deev tau txiav txim siab li cas hauv tib neeg? Hauv tib neeg , biological pw ua ke yog txiav txim siab los ntawm tsib yam tshwm sim thaum yug los: muaj los yog tsis muaj Y chromosome, hom gonads, cov tshuaj hormones poj niam txiv neej, sab hauv genitalia (xws li lub tsev menyuam hauv poj niam), thiab sab nraud genitalia.

Ntawm no, dab tsi yog qhov chromosome txoj kev xav ntawm kev xeeb tub?

Cov Chromosomal Theory of inheritance , thov los ntawm Sutton thiab Boveri, hais tias chromosomes yog cov tsheb ntawm caj ces caj ces . Tsis yog Mendelian noob caj noob ces los yog noob caj noob ces yog zoo kawg nkaus; xwb, chromosome Kev coj cwj pwm cuam tshuam nrog kev sib cais, kev ywj pheej, thiab qee zaus, kev sib txuas.

Dab tsi yog qhov txawv ntawm Txoj Cai ntawm Segregation thiab Txoj Cai ntawm Kev ywj pheej Assortment?

Cov kev cai cais hais tias ob qho alleles ntawm ib qho kev zoo yuav cais randomly, txhais tau hais tias muaj 50% yog allele yuav xaus. hauv ob gamete. Qhov no tau ua nrog 1 gene. Cov txoj cai ntawm kev ywj pheej assortment hais tias allele ntawm ib lub noob cais ywj siab ntawm ib qho allele ntawm lwm cov gene.

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