DNA is a chain of the polynucleotide. A nucleotide is made up of a deoxyribose sugar, a nitrogenous base on the first carbon of sugar and a phosphate group on the fifth carbon of the sugar. The DNA arrangement of every individual is unique to them, which can be used for DNA profiling. DNA profiling can be used for parenting tests. The progeny's half DNA is matched with mother and a half with father.

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Chapter 8, Problem 8LTB

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DNA is a chain of the polynucleotide. A nucleotide is made up of a deoxyribose sugar, a nitrogenous base on the first carbon of sugar and a phosphate group on the fifth carbon of the sugar. The DNA arrangement of every individual is unique to them, which can be used for DNA profiling. DNA profiling can be used for parenting tests. The progeny's half DNA is matched with mother and a half with father.

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Compare the bands of each set of parents to each of the babies and determine vhich baby belongs to which set of parents. Line up the bands and illustrate vhich bands each baby inherited from its mother and from its father. Couple C M F Couple B Baby Baby Baby Couple A M F M F 1 3 Figure 1 DŇA fingerprint data obtained from three sets of infants and three sets of parents a. Identify which baby belongs to which set of parents. b. Explain why not all the bands in the mother's or father's profiles have counterpart in the baby's DNA profile. c. List other examples where DNA fingerprinting could be used to identify an individual. d. Explain why blood typing may not be a viable method of determining which baby belongs to which parent. e. Identify the largest DNA fragment on the gel. Identify the smallest DNA f. fragment on the gel. | | | | | || || | |

An important application of DNA fingerprinting is relationship testing. Persons who are related genetically have some bands or peaks in common. The number they share depends on the closeness of their genetic relationship. For example, an offspring is expected to receive half of his or her minisatellites from one parent and the rest from the other. The diagram shown here schematically illustrates traditional DNA fingerprints of an offspring, mother, and two potential fathers. In paternity testing, the offspring’s DNA fingerprint is first compared with that of the mother. The bands that the offspring have in common with the mother are depicted in purple. The bands that are not similar between the offspring and the mother must have been inherited from the father. These bands are depicted in red. Which male could be the father?

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