Cov txheej txheem:

Hugo de Vries nrhiav tau dab tsi nyob rau yav tsaus ntuj primrose?
Hugo de Vries nrhiav tau dab tsi nyob rau yav tsaus ntuj primrose?

Video: Hugo de Vries nrhiav tau dab tsi nyob rau yav tsaus ntuj primrose?

Video: Hugo de Vries nrhiav tau dab tsi nyob rau yav tsaus ntuj primrose?
Video: Mechanism of evolution- Hugo de Vries 2024, Kaum ib hlis
Anonim

De Vries ntseeg hom evolve los ntawm lwm hom los ntawm tam sim ntawd, loj hloov ntawm tus cwj pwm zoo. De Vries raws li qhov "kev xav ntawm kev hloov pauv" ntawm kev ua haujlwm nws ua siv Oenothera lamarckiana - lub yav tsaus ntuj primrose.

Kuj paub yog, Hugo de Vries ua dab tsi?

Hugo de Vries (1848-1935), Dutch botanist thiab geneticist, yog tus sau ntawm kev hloov pauv txoj kev xav ntawm evolution. Nws txoj haujlwm tau coj mus rau kev tshawb nrhiav thiab tsim kho Mendel txoj cai. De Vries ua nws thawj qhov tseem ceeb pab rau kev tshawb fawb hauv xyoo 1880 hauv kev cog qoob loo physiology.

Ib yam li ntawd, qhov twg cog Hugo de Vries tau ua nws txoj haujlwm? Hauv nws tus kheej lub sijhawm, De Vries yog paub zoo tshaj plaws rau nws kev hloov pauv txoj kev xav. Nyob rau hauv 1886, nws tau pom cov ntaub ntawv tshiab ntawm cov zaub ntawm tus yav tsaus ntuj primrose (Oenothera lamarckiana) loj hlob qus nyob rau hauv ib qho chaw tso tseg qos yaj ywm nyob ze Hilversum, tau khiav tawm lub vaj nyob ze.

Tom qab ntawd, lo lus nug yog, leej twg tau tawm tswv yim txog kev hloov pauv?

Raws li cov kev soj ntsuam saum toj no, Hugo de Vries (1901) muab tso rau tom ntej a kev xav ntawm evolution, hu ua kev hloov pauv txoj kev xav . Cov kev xav hais tias evolution yog ib tug jerky txheej txheem uas tshiab ntau yam thiab hom yog tsim los ntawm kev hloov pauv (discontinuous variations) uas ua hauj lwm raws li raw khoom ntawm evolution.

Dab tsi yog 4 hom kev hloov pauv?

Muaj peb hom DNA Mutations: kev hloov pauv hauv paus, tshem tawm thiab ntxig

  • Kev hloov pauv hauv paus. Ib lub hauv paus hloov pauv yog hu ua point mutations, nco qab qhov kev hloov pauv ntawm Glu --- Val uas ua rau mob mob-hlwb.
  • Kev tshem tawm.
  • Insertions.

Pom zoo: