Pedigree 1: A. What is the most likely mode of inheritance of this disease? Choose from: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive. B. State the genotypes of individuals #1-#3. C. What is the probability that individual #4 is a carrier of this disease if his mother is homozygous dominant and his father is heterozygous?
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- PATERNITY TESTING Family Inheritance of STR AIleles (D13S317) 110 11 14 Father 12 14 Child al 14 Child a2 11 12 Child a3 12 Mocher A). What is the meaning of the numbers above the peaks for the father? B). How many Child/children belong to both parents? C). Define STR D). Define D13S317A DNA variant has been found linked to a rare autosomal dominant disease in humans and can thus beused as a marker to follow inheritance of the diseaseallele. In an informative family (in which one parentis heterozygous for both the disease allele and the DNA marker in a known chromosomal arrangementof alleles, and his or her mate does not have the samealleles of the DNA variant), the reliability of such amarker as a predictor of the disease in a fetus is related to the map distance between the DNA markerand the gene causing the disease.Imagine that a man affected with the disease(genotype Dd) is heterozygous for the V1and V2forms of the DNA variant, with form V1on the samechromosome as the D allele and form V2on the samechromosome as d. His wife is V3V3dd, where V3isanother allele of the DNA marker. Typing of the fetusby amniocentesis reveals that the fetus has the V2andV3variants of the DNA marker. How likely is it thatthe fetus has inherited the disease allele D if thedistance…Classical hemophilia is a sex-linked disease caused by a recessive gene on the X chromosome. (Hemophilia refers to diseases that cause delays in blood clotting.) If a woman who is acarrierof classical hemophilia has children with a normal male, give the ratios of the possible offspring with respect to classical hemophilia. Be sure to state both the genotypes and the phenotypes of each offspring. For genotypes, use X for a normal X chromosome, Xh for an X chromosome with the hemophilia gene, and Y for a normal Y chromosome. For phenotypes, if the offspring is female, be sure to state if homozygous normal, a carrier, or has the disease. If the offspring is a male, be sure to state if normal or has the disease.
- The table below shows the blood types of mothers and children. Complete the table by filling in all the possible genotypes for the mother and child. For each given mother and child, list any genotypes that can be eliminated as possibilities for the father. Blood Type Genotypes Mother Blood Type Mother Possible Genotypes Child Blood Type Child Possible Genotypes Impossible Genotypes for Father A |A JA or IA i ii only JA 1B, IA 1A, IB IB АВ A АВ АВ АВ B ANiemann Pick Type C disease is a recessive disorder that causes the accumulation of cholesterol and other lipids in lysosomes, ultimately affecting both the liver and the nervous system. Below are the genotypes and phenotypes of offspring of a family with a history of Niemann Pick. 7 NN ( all normal phenotype) 3 Nn (all normal phenotype) 4 nn (1 early onset dementia, 1 mid-life onset dementia, 2 late-onset dementia). From this information, Niemann-Pick disease is an example of: A) variable expressivity B) incomplete dominance C) incomplete penetrance D) variable expressivity and incomplete penetrance E) multiple allelesII 2 III 1 Refer to the pedigree above. What is the genotype of person II-1 if this pedigree is for hemophilia? (A dot in the centre of a symbol indicates a known carrier of a recessive trait). hh O xtxh Hh O xhy OxHy
- The pedigree below shows a family affected by a disease. Assume that the individuals marked with an asterisk (*) do not carry any allele associated with the affected phenotype, no other mutation spontaneously occurred, and complete penetrance. Answer the following questions below. Use the notation XR for the allele associated with the dominant phenotype and Xr for the allele associated with the recessive phenotype. Q1) Give the genotypes for as many individuals in the pedigree as possible.Using the following single letter gene designations. R - dominant allele for purple colored kernel r - recessive allele for yellow colored kernel S - dominant allele for smooth kernel s - recessive allele for wrinkled kernel What is the phenotype of an individual with the genotype RRss?Answer the following questions given the pedigree below. Please assume that no other mutations are occurring, complete penetrance, and that the individual marked with an asterisk (*) doesn’t carry the allele causing the affected phenotype. Q2) What are the genotypes of the following individuals listed in the table below. Use the uppercase “A” to represent the dominant allele and lowercase “a” for the recessive allele. Individual All possible genotypes I-2 II-1 IV-2 V-2 II-2 II-3
- tate.edu/d21/le/content/5003190/viewContent/44015425/View 8. Consider the following phenotype for hemophilia, a recessive X-linked blood clotting disorder, in decendents of Queen Victoria. Victoria is thought to have been a carrier for the recessive hemophilia allele. What is the probability that Princess Irene is also a carrier? Albert Victoria (1819-1901) Helena Leopold Alice of Hesse Empress Edward Beatrice Victoria VII Princess Duke of Christian Albany Kaiser George Wilhelm II Princess Frederick (Alexandra) Irene Alice of Athlone Victoria Leopold Maurice Eugenie (wife of Alfonso XIII) Alix Tsarina Nikolas IIDuchenne muscular dystrophy is sex linked and usuallyaffects only males. Victims of the disease become progressively weaker, starting early in life.a. What is the probability that a woman whose brotherhas Duchenne’s disease will have an affected child?b. If your mother’s brother (your uncle) had Duchenne’sdisease, what is the probability that you have receivedthe allele?c. If your father’s brother had the disease, what is theprobability that you have received the allele?We often speak of diseases such as phenylketonuria (PKU) andachondroplasia as having a genetic basis. Explain whether the followingstatements are accurate with regard to the genetic basis ofany human disease (not just PKU and achondroplasia).A. An individual must inherit two copies of a mutant allele to havedisease symptoms.B. A genetic predisposition means that an individual has inheritedone or more alleles that make it more likely that she or he willdevelop disease symptoms than other individuals in a populationwill.C. A genetic predisposition to develop a disease may be passedfrom parents to offspring.D. The genetic basis for a disease is always more important thanthe environment.