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6enetia Scienqe l-earning Center http ://gslc. genetics. utah.ed u Tour of the Basics Web Quest - Answer Key ,, ' tt1,t:jirtiiii{ti;iij:iiil;l Lo g o n to : http :// gslc.$en etf cs . u ta h. e d u/ u n i ts/ b as i cs / ta u r/. Explore this activity to find the answers to the guestfons below. 7. What is DNA? Ifue insfrucfi*ns fnr Su#ding par{s *f ffus ceJJ. What does "DNA" stand for? ilecxyr rfo ciVurfeic A eid What rs the four-letter DNA alphabet and what are the specia I rules by which the alphabet pieces bind to{ether? S, S, il and S. ,4 $rnds w#ti C brncjs w#i: G. I What is a gene? Genes *rs rnsfr*e#on lnanua/s foJ'*ur $*dies. What are genes made of? Senss sre ffiade of SrV"A. How many genes do humans have? Humar:s *ave fS,$SS Srs$ss. For what molecule do genes contain the instructions for building? Smnes conf*fu fhe rrisfrscfipns forfoe,rildrng proferns. B. What is a chromosome? Gftrcmnsciylss ars pnck*g*s *ie*rrup*cf OIVA. 9. How many chromosomes does a human cellhold? Sac$ l"rumran **ll fuolds 46 cftronrp$sffis,s. 70. How are the human sex chromosornes labeled? ,$*x cftronross,?lss ar* Jabefsd "X,'&ild "Y"" 77. How many different kinds of proteins does one cellcontain? S**ft esll confs!,?s #:sus**ds *f differenf prcf*#:s" O 2004 University of Utah Genetic Science Learning Center, 15 North 2030 East, Salt Lake City, Uf 84112 Le*rning Cent*r Genetic Science http //gslc. genetics. utah.ed u : 12. Why do scientrsts use computer proSrams to mode/ protein structure and function? Proferns frr€ vsry/ srnail nnd hsrd fo see, 1) -tJ, What provides the "blueprint" for makinS a protein? Ser:es pr*vf*tre fl"re Slueprnf for rns${ffig a profern. 1_4. What is heredity? Ihe passf*grof fraffs fr*m g:nrenf fc cftifd 75. Why aren't children identicalto either one of their parents? ffelc& par*nf confir*{"{fss CIr?s s*f of s,hrCI$?sssffes fo each cfuifd Ifoe sef of eforomosoffes is passed nm ranrj*m/y so eacft ehiJd seeeives a uniq*e *on'rbrn*#**. 16. ln humans, how many chromosomes does each parent pass on to their offsprinS? Sscll pnrenf pss$e$ on ?3 chrornoscmes fo fftetr offsplrr:g. second baby in the What is Heredity? animation inherit the exact same chromosomes as the first? Do both babies have a complete set? lV*, ffue ss$or?d foaby's cftromcs*$ls$ firs diffsr*nf frcm ffue fir"sf fucby's. Yes, bnfft fuabies havs s conrplefe sef" 17. Does the L8. What is a trait? A frail rs e* n*fable feelfure cr qualify rn o pers*n. 79. Listthe types of traitsthatexist. Iftsrs *re: pliysrcal fr*ifs, be/imui*raf frm#s, and predisposiflons f* msdlcsJ e*srilfrons. 20. an example of how an environmentalfactor can influence a trait. .Sfiswers may rn*lwde one of ffue fi:iiovvslgrj sxpcs{Jre f* sur"i or Jr*ir ct'ycs can crh**gc fumrrccio{ y*{r ctrr? frain refrueyel:s f* ro/foirer*r:dpJeydsadinsfeadcf fef*h, *nfing trealfhy f*ods anci exercisrng e*n decrense fhs nsfs of hesrf dissase. Give 27. Briefly explain how the Hitchhiker's Thumb trait is determined usinSthe following words: allele, daminant, recessive, homozygous, heterozygious. You may draw pictures if you wish. €xample *r?svvsr: /f fr*'o d"*mlnq"m".{.n$gl"es sre rnf'}erifed, fj:c psrssn is hpm"q"ay"gog$ nnd ud// have m irifetuf':ik*rs ftullnib. if twn r$"fiS.$Siti"S eflp"k$,-are fnfterifed, ftoe p*rson rs &gffiffigggtr$ and r,vij/ ftave s sfrafgftf ffrutrnh. lf a person is ftgkfggxggtrs, s$s $,qmit:le*l and one rsfi.e_S$-t"r/*$ *,"l.j.Sle ars rnlreriled mnd lhnf persCIn wiJl *sve a /iifchhiker's fftunrb. o4r"lswers wrJi veeryr. A 2A04 University of Utah Genetic Science Learning Center, 15 North 2030 East, Salt Lake City, UT 84112 6ofO