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GeneticsEXAM2 - Bio 7 Nam Rodriguez Section Quiz 1 In...

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Unformatted text preview: Bio 7 Nam: Rodriguez Section: Quiz 1. In rabbits two linked loci control eye pigmentation and tail thickness. Dull eye (d) and thin tail (1h) are the mutant ( non wild type ) conditions. A bright eyed and bushy tailed “ cis" heterozygote is mated with a dull eyed, thin tailed male. ~ Out of 200 offspring, 16 are dull eyed and bushy tailed. A. Using the “ line “ below to separate the linked loci. draw the loci A arrangement of the female parent (use correct loci terminology which involves the “ + “ type of representation- B. Do the same for the male parent below. ,1 Draw the two recombinant GANEETE possibilities below. D. , , _Draw the four types of OFFSPRING that may result from this crossiv. E. How far apart are these loci ? map Units F. Draw the map of the chromosome below showing the appropriate map units. ' ‘ Bio 7 W Name: Rodriguez , Section: Quiz 1. In rabbits two linked loci control eye pigmentation and tail thickness. Dull eye (d) and thin tail (th) are the mutant ( non wild type ) conditions. A bright eyed and bushy tailed “ cis” heterozygote is mated with a dull eyed, thin tailed male. Out of 200 offspring, 16 are dull eyed and bushy tailed. A. Using the “ line “ below to separate the linked loci, draw the loci arrangement of the female parent (use correct loci terminology which involves the “ + “ type of representation. d ‘L +L.+ '7 A *L—IA B. Do the same for the male parent below. .5 - «.44 C. Draw the two recombinant GANEETE possibilities below. 4,. 7 . d t In 4/ 1815’ -,D. . Draw the four types of, OFFSPRING that may result from this cross. W , ,'— + + 4/ £14 :1 4- 4.1L 4/ as A 4’ 4:1,. 4’ t: L. A «EA :1' £11 A - Ht B. How far apart are these loci ? l L map units F. ‘ Draw the map of the chromosome below showing the appropriate map units. Bio 7 Name: Rodriguez 7 Section: Quiz A certain cross was set up to produce a gamete producer which is heterozygous at two loci A a B. This gamete producer is then crossed with a homozygous recessive, A = tall B = hair a = short b = bald 400 oflspring were examined. The following phenotypes were observed: 352 were either tall hairy or short bald 48 were either tall bald or short hairy 1. Linked / unlinked? 2. Cis ltrans? 3. Draw map. 4. % of tetrads which crossed over? Subsequent crosses involving the A locus and a third locus “C" ( C=hairy back. c 2 plain back ) were performed. C is in a cis arrangeth with A, and a heterozygous ( both loci) gamete producer was crossed with a homozygous recessive (both loci ), and the offspring were; 3% tall plain back 1. Drawthe map. Can you draw a map of all three loci (A,B,C)? or How do you know which is correct? Bio? ' Name: Rodriguez Section: Quiz ' Crosses between B & C you say??? OK ..... Bch ( cis) x bboc Of 287 offspring, 25 have the Bc phenotype. 1 . How many have the b0 phenotyoe? 2. Whratis the % recombinant offspring? 3. How far apart is B trom C? 4. What mustthe correct map be? Emsbe‘tmmfifi ICE-you say?“ EIK Eta-3cm“ I: lam: WEI-11%. :‘hharetr'eli-mmfpe 1mwmvhawhb5nm" 25 2' Malenahmmnflwm? 131% a Hmrmmninfimwizfi 13 mu 4. WM: mm mm mrrmfi n-qr nu“ ...
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