Demonstrate how males are at an increased risk of sex-linked recessive traits by crossing a female who is a carrier for Hunter syndrome with a normal male. The genotypes involved are XH, Xh, and Y. State the genotypes and phenotypes of the offspring.
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- Demonstrate how males are at an increased risk of sex-linked recessive traits by crossing a female who is a carrier for Hunter syndrome with a normal male. The genotypes involved are XH, Xh, and Y. State the genotypes and
phenotypes of the offspring.
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- If an individual has the dominant phenotype for an x-linked trait, what is/are the possible genotype(s)? if an individual has the recessive phenotype for an x-linked trait, what what is/are the possible genotype(s)? Practice a Punnet square for each of the following autosomal combinations. Assume complete dominance. Determine the genotype and phenotype ratios of the offspring. Genotype ratio = _____GG : _____ Gg: ______gg. Phenotype ratio = _________dominant trait : __________recessive trait. parents with genotypes GG and Gg parents with genotypes Gg and Gg parents with genotypes GG and gg parents with genotypes Gg and gg Practice a Punnet square for each of the following x-linked combinations. Determine the genotype and phenotype ratios of the offspring. Genotype ratio = _____XGXG: _____ XGXg: ______XgXg:_______XGY: _____XgY. Phenotype ratio = _________dominant trait : __________recessive trait. parents with genotypes XGXG and XgY parents with genotypes XGXg and XgY parents with…Assume that the incidence of an X-linked recessive disorder is 1 in 200 male births. What is the frequency of the mutant allele?A. Color-blindness is a recessive, sex-linked disorder in humans. A color- blind man has a child with a woman who is a carrier of the disorder. KEY: X= normal vision XC = color-blindness 2. Illustrate using a Punnett square the probability of having children who will have normal vision and children who will be color-blind. Guide Questions: a. What is the genotype of the male?. b. What is the genotype of the female? c. What is the chance that the child will be color-blind? d. What is the chance that a daughter will be color-blind? e. What is the chance that a son will be color-blind?
- An individual with 46, XX genotype is diagnosed with Duchenne-type Muscular Dystrophy, a recessive X-linked disorder. Genetic tests confirm that this individual is a heterozygote for this disorder. Briefly, but specifically, explain how it’s possible that they are showing symptoms of this disorder.A male with autosomal dominant brown hair and a female with unknown hair color have 3 sons with recessive blonde hair. What is the male’s genotype? What are the possible genotype(s) and phenotype(s) [hair color] of the female?Sickle cell anemia is inherited as an autosomal recessive condition. It also exhibits incomplete dominance in that the heterozygous genotype displays a mild form of the disease known as sickle cell trait while individuals with the homozygous recessive genotype have a severe form of SCA. A man who has severe sickle cell anemia marries a woman who suffers from a mild trait. What is the probabilitu they will have a child with severe SCA?What is the probability they will have a child with mild SCA? What is the probability they will have a normal child? Show ALL work using punnett squares.
- The determiner for brown eyes (B) is dominant to blue eyes (b) and is not X-linked. A colorblind man with brown eyes, whose mother was blue-eyed, marries a blue-eyed woman having normal vision, whose father was colorblind. Show the expected phenotypes ratio of their children involving eye color, color blindness, and sex.Discuss the differences among sex-influenced, sex-limited, andsex-linked inheritance. Give examples.A man who is a dwarf due to achondroplasia and has normal vision marries a color-blind woman of normal height. The man's father was 6 feet tall, and both the woman's parents were of average height. Achondroplasia is autosomal dominant, and red-green color blindness is X-linked recessive. What are the possible genotypes and phenotypes of their children? What are the ratios for each? For full credit, you must show all work.
- Define what is a sex-linked disorder? A Bb guinea pig crosses with a Bb guinea pig and four offspring offspring offspring are produced. All of the offspring are black. Explain how this could happen.A gene that controls the ability to see red and green is located on the X chromosome but not on the Y chromosome. There is a recessive nonfunctional allele for this gene that can cause red-green color blindness if the person possessing it does not also have the dominant normal gene. Consider the case of a carrier mother who is heterozygous for the red-green vision gene and a father who has normal vision. Use XB = normal vision, Xb = color-blind vision. What is the chance the parents would have a color-blind boy? A color-blind girl? What about a girl or boy with normal vision? Redo the Punnett square for a carrier mother (XBXb) and a color-blind father (XbY). Do the chances of having color-blind children change? How?In 1-3 sentences define the following heredity types: Autosomal dominant and recessive, X-linked dominant and recessive, epistasis, polygenic, codominant