Science 30 January 1999 Grade 12 Diploma Examination
Science 30 January 1999 Grade 12 Diploma Examination Science 30 January 1999 Grade 12 Diploma Examination
Use the following information to answer the next two questions.Early in 1997, a group of researchers in Scotland reported that they had cloneda sheep using genetic material from an adult female sheep. They named theclone Dolly. The following diagram outlines how this cloning wasaccomplished.Process of Cloning a SheepSheep ARemoveudder cellfrom sheep AFuse cellsRemove DNA fromunfertilized eggZygote withDNA fromsheep ACultureImplantedsurrogateClone of A (Dolly)11. The percentage of genetic material that the clone (Dolly) has in common withsheep A is approximatelyA. 0%B. 25%C. 50%D. 100%6
12. The zygote is cultured and is implanted as a multicelled embryo. During the steplabelled “Culture,” the cells of the future clone undergoA. mitosisB. meiosisC. fertilizationD. gene splicingUse the following information to answer the next question.Punnett Squares1TTT2TTttt3tTt4tttttT – Dominant traitt – Recessive traitNumerical Response02. Inherited traits are determined by the gene pairs of parents. Match the Punnettsquare, as numbered above, with the probability of a recessive trait being expressedin the offspring, as listed below.0% _____ (Record in the first column.)25% _____ (Record in the second column.)50% _____ (Record in the third column.)100% _____ (Record in the fourth column.)(Record your answer in the numerical-response section on the answer sheet.)7
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Use the following information to answer the next two questions.Early in 1997, a group of researchers in Scotland reported that they had cloneda sheep using genetic material from an adult female sheep. They named theclone Dolly. The following diagram outlines how this cloning wasaccomplished.Process of Cloning a SheepSheep ARemoveudder cellfrom sheep AFuse cellsRemove DNA fromunfertilized eggZygote withDNA fromsheep ACultureImplantedsurrogateClone of A (Dolly)11. The percentage of genetic material that the clone (Dolly) has in common withsheep A is approximatelyA. 0%B. 25%C. 50%D. 100%6
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