. Share Styles Pane k for Updates Biblogy 202- Sample Midterm II QUES. 7-9. In D

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. Share Styles Pane k for Updates Biblogy 202- Sample Midterm II QUES. 7-9. In Drosoghila, you cross pure breoding eboey body () long singed sflies wpure broeding IThis sample exam will give you an idea of the ypes of questions th may appear on Mider 2 This sample exa Does Not cover sveryhinga you are expeesed lo know oe the em .ccture Notes Lecture Slide Sets, Problem Sets, and Lab Exrcises cover all of the raterial that you are responsible o tan body (e, shot winged ()ie. All Fl is have tan body and long wings Yoa cross Fl females to ebony, shor winged males. The following pbenoayges are obscrved among 1000 offspring 159 cbony sht 338 chony loag: 16 an long: 342 tan short 7. The paremal type gametes peodueed by the F individuals wrer ae& es Not allo the marerial on this sample exam will on Midterm 2. These questions are macked NC. Questions 1-6 cover maicrial from Midterm 1. This year there will not be as many Midtem questions on Midierm 2, but as I indicated, there willquestions on mitoeis and mciosis on the cxam. 8. The gamete roceived from the Fl temales by tan lon otspring is Yoa should reahOwever, that an understanding of all of the material from Midterm iessential to ally mderstand the matenial tha: wll be covered on Miem 2 (quantitaive penecicspopulation gesetics, natural selection pacion, and speciacioe) 9. The ap disance between the eandsloi 0 b)68 e)38 4)32 e)20 in a test cross of a double heerozyg00. cach or the recebinant type gametes oceurs ?:a frequency of 15%. Thc expected frequency of each of the parental type gametes is 1) 152k ) 20% o) 35% d}45% c)50%. 10. Multiple choice 1. A spceies has a diploid eomasose number of10. Ia cells uadergoing meiosis he aumbe of chromosames preseat in one of the wo cells produced atter the tirst division of meiosis is a) i h 10 3 d)20 d)40. 12. recessive geasic disease caused by ihe p allele. Based ? our discussion of Phenylketuauria (PKI) is this disease in lecture, whict of the slowing stanemets is true a? ? pp individual will always exhibit the elteets of PKU, regandless of the diet tha: addual is raised on b) PPexhihe effecis of PKur raised on a diet high in phenylalanine c) app individeal will not exhibit the offects of PKU if raised on a diet low in paenyalaene d) the enotype or a pp individual will change ??Pp when raised??dict low in phery alaie )he genotypz of a pp individual will change to Pp when raised on a diet high in phenylalunine 2. Bb Ce individual with an individual of gerooype Aa Bb ec: The exposted proportion of You cross an A offapring o genotype Aa Bia) 12 b)14 e) 32 3. dominast allele. H and aaca?X stems arise tom the 1.omato alias hairy stems are produced by capression of its roccssive allelo. h. For the rait of plant heiph:, a dominantalle D, produces tall plants while the recessve llele. d.peodsees dwarf plas The loci assorn independenty. You cross a haiy tem tall plant of unknown genotype toniwarfpiant and ohsere that halfofth offspring plants aro hairy short and half are hairy all. The gczopo of the hairy tall parent plant is 13, which oftse following would be al approprate measure of the phenotypic variation of a trait in a pogulacinna) theea ofbe tralt in the populacioe b) the staedard deviation of the t hetability of the tait d the allele frequency of genes affecting thetrait 4 14. Evolutioney cangeoLait in a popualion der the eTeet of selection ean occu only when xSuchs disease is caused by an autosomal alle,t, that is recessivewhe normal allele, T. A noma man and sotmal woman have ? ree children, a normal saa, a teemal daugauer, add a daughter with the disoase. The probability tha the nocnal soa is a Tt carrier of the discase is a)23 b 13 ) 1/2 14 15. You exanise body weight in aboey populaticn of miee You nd hat individal ll to five . The 1 ad eeof the ABo biood group ate codominas, and both are dominas to the allele. discrete weight elcs with mcan weights af 15 gas, 20 gr, 25 gr, 30 g and 35 gr. The variance of weigt within eachlass is very lo, nd the dibution of we ghts in the dterent weight classes do no overlap, Based on thesc observations you would coaclude that in this population and envionment 1) body weight ?sa quantitativo body wcnght a qualitative tran c > body wcet is affected by many diTereal geies d) body weight is fecied onl by eimenl a&d; n erozygote maries an indiidual of blood type o. What phenotypes of oftspring are possible in 6 Ifthc B allele is dominsas to the b allele, a 1-1 phenotypic ratio is espected in which of the following 16. In sze plans, helght is affeced by cnly one gee, T Oue trundred seeds of genotypeTT are growain field. Afler ote mat dhe plans emasured and are Sound lo eahibit a coninuous omal distributios of heights ranging from 4 to 12 inches. What can you conolode about this phenotyie variacion? a) it muss be due 10 genetie variation alone ) it must be due to etneamental variation ?1one ?) Dis due a combination of genetic and environme tal variation d) you cannot tll the souree of the variation. Page 1 of 6 3102 Words E English (US) FFocus- 90%

Explanation / Answer

1. 5 (in anaphase I the chromosome number gets halved.)

2. 1/32 (2/4 *1/4*1/4)

3. HHDd(mono hybrid test cross ratio will be 1:1)

4. Parents genotype is Both are heterozygous Tt

So probability of son to be Tt is though he is normal then it will be 1/2

5. So A and B only

6. Option d

Bb x bb

Monohybrid test cross

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