In1822GregorMendalwasbornonafarminAustria.HisfatherfoundthatMendalwasinterestedinplants.HeknewthathissonwascleverandheMendaltohighschool.Atthattimepeopleattendedhighschool.Howeversincehisfathercouldnotgivehimenoughmoneyhealwayswent.LuckilytheotherstudentsalwaysgavehimfoodfromtheirLaterMendalbecameamonk(修道士)andhisstudies.Hetookcareofthegardensatthewhereheandtheothermonkslivedandhedidwithpeaplantsforeightyears.Hewantedtoprovethatparentsfeaturestotheirchildren.Around1860Mendalthatplantshaverecessiveanddominant(显性的)genes.

Hegrewatallpeaplantwithashortpeaplant.Everyoneofthefirstgenerationoffourpeaplantswastall.Thisthattallwasthedominategene.inthenextgenerationoffourpeaplantsoneplantwasvery.Therecessiveshortgenesitreceivedfrombothofitsparentshadmadeitshort.

Fromtheseexperimentsheunderstoodthatdominantgenesthemostofteninthe.Recessivegenesonlyappearedandonlywhenbothparentscarriedthegenesforthefeatures.

Tohisfindingwithothershewroteapaper.Butduringhislifetimenoonewhathehaddiscovered.Atthetimeofhisdeathhestillfeltverysad.

hisimportantdiscoverywasacceptedin1990.Wenowknowthatbothplantsandanimalshavegenesandthatgenesplayamajorroleinwelookhowweactandwhetherornotwearetogetcertaindiseases.TodaywehonorMendalasFatherofhereditizm(遗传学).

1.A.droveB.sentC.forcedD.had

2.A.fewB.afewC.manyD.alot

3.A.anxiousB.crazyC.hungryD.straight

4.A.platesB.dining-roomsC.dormsD.lunches

5.A.lastedB.stuckC.startedD.continued

6.A.villageB.hometownC.templeD.school

7.A.researchesB.surveysC.observationsD.experiments

8.A.passedB.gaveC.offeredD.hid

9.A.noticedB.discoveredC.declaredD.prove

10.A.agreedB.meantC.announcedD.informed

11.A.ThusB.InsteadC.DespiteD.Yet

12.A.strangeB.fineC.shortD.cool

13.A.showedupB.stoodoutC.setasideD.turnedon

14.A.parentsB.studentsC.childrenD.monks

15.A.seldomB.sometimesC.actuallyD.mainly

16.A.compareB.sh