38 Which of the following teams of people demonstrated that DNA carries the inhe
ID: 257268 • Letter: 3
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38 Which of the following teams of people demonstrated that DNA carries the inherited material and not protein? A Watson and Crick B. Gregor and Mendel C. Horshey and Chase D. Franklin and Chargaff 39. A woman with type A blood and a man with type A blood could produce a child with blood if A. both parents were homozygous dominant for type A blood. B, one parent was homozygous dominant for type A blood and the other parent was C. both parents were heterozygous and had type A blood 40. When does DNA replication occur? A. During mitosis B. During interphase C. During cytokinesis D. During prophase E. During G1 Short answer/Essay-4 points each: 20 points/100 points total. Complete 5 of your choice Make sure you number your answers on your scantron/paper so that the num the questions that you chose to answer. You may complete 5 additional questions for extra credit (20 points total extra credit available). bers match 41. Please explain the term "crossing over and the condition in which it occurs. 42. What is complete dominance? 43. What is Mendel's law of segregation? 44. Regarding the case study completed in class: Why did it matter if Maria's parents were related? 45. Please draw or describe what occurs during the average cell cycle. Provide details for full credit 46. What is a gene?Explanation / Answer
Q.38 Answer is C Harshey and Chase demonstrated that inherited meterial is DNA and not the proteins. Initially Grifith, Mcloed, Avery, Mccarthy had proved DNA is transforming factor. But Alfred harshey and Martha chase experiment on Bacteriophage confirmed that Protein is not inherited but DNA is inherited. They had experient with S35 labelled radio isotope ( as sulphur found in amino acids mainly), P32 labelled isotope on bacteriophage and E.coli. Where they found P32 was inherited in projeny. Because phosphorus is mainly present in DNA and as DNA is inherited P32 was also inherited. As proteins are not inherited S35 isotope was not inherited. Indicating protein is not inherited.
Q.39 Answer is C. Both parents heterozygous and had type A blood group. When parents are heterozygous they will have genotype as IAIO . When this genotype is present Chances of getting O blood group is 25%. But when both are homozygous they will have genotype IAIA. Sochancesof having O blood group are impossible. If one is homozygous IAIA and other is heterozygous IAIO . As A is dominant over O. only single allele of O will not be able give phenotype of O blood group. So when both are heterozygous IAIO chance of IOIO is 25% which can give O blood group.
Q.40 Answer is B- During interphase. DNA replication occur during interphase. In the interphase there are 3 stages- G1 ,S, G2. In the G1 stage cell prepares itself for replication. During S (synthesis) stage actual DNA replication occurs and new DNA is synthesized. During G2 stage cell prepares itself for mitosis.
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