2. A red-green colorblind woman marries a man with normal vision. Their first child is a girl. Their second child is a boy. What is the probability that the girl will be colorblind? What is the probability that the boy will be colorblind? Briefly justify each one of your answers.
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Q: 1. A woman is colorblind. Construct a Punnett square and using versions of the letter “C” determine…
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Q: heterozygous genotype
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- 1. A woman is colorblind. Construct a Punnett square and using versions of the letter “C” determine if she marries a man with normal vision: What are the chances her sons will be colorblind? What are the chances her daughters will be colorblind? What are the chances of having a carrier daughter? 2. Both the husband and wife have normal vision. Their son is colorblind. What can you conclude about the father’s genotype? What about the mother’s genotype? Father: Mother: 3. If a young girl has fragile X syndrome, a recessive trait (f), what is her genotype? What are the possible genotypes of her father and mother? Mother: _________ or __________ Father: _________________ If her brother also developed this condition, which parent (father, mother, or both) contributed a disease allele? Explain your answer as well as constructing Punnett squares to support your answer. 4. Both the mother and father of a hemophiliac son have normal blood clotting. What are the genotypes of the…3) The ability to curl ones’ tongue up on the sides (T) is dominant to not being able to roll your tongue (t). a. A woman who can roll her tongue marries a man who cannot. The first child has the same phenotype as the father, what are the genotypes of the mother, father, and this child? b. What is the probability that the second child won’t be able to roll it’s tongue?Part 1 - High School Blues Evan and Alexia had been happily married for seven years and had a delightful five-year-old son named Ryan. One day, while going through his old high school biology textbook, Evan stumbled on some troubling information. In the section on the genetics of eye color, he read that two blue-eyed parents cannot produce a brown-eyed child. This was disturbing to him because both he and Alexia had blue eyes, but Ryan had brown eyes. He and Alexia were very much in love and Evan didn't believe his wife had been unfaithful. Puzzled, he questioned his wife, who confirmed she had been faithful to him. Evan had known Alexia long enough to recognize when she was lying and detected nothing but honesty in her response. What is going on?
- Given the karyogram below, anSW Is this a male or female? female Do you see any abnormality? Yes 13 Write the karyotype (genetically speaking)|Brown eyes are dominant over blue. This is NOTA sex-linked trait. If a blue-eyed colorblind woman marries a normal visioned man who is homozygous for brown eye color, what kind of children might they expect with respect to these two traits? 5. Genotype of woman _Genotype of man What two genotypes are possible in the children? If one of the sons in turn marries a heterozygous brown-eyed, normal visioned woman, not a carrier, what kinds of children might they expect? Genotypes PhenotypesSUBJECT: GENETICS Topic: Probability 1. Consider albinism a trait to occur in a human family. If two parents areheterozygous for such trait, the probability of having a normally pigmented child is 3//4 and having an albino child is ¼. What is the probability that 2 will be normal and 1 will be albino?
- 8. One daughter from the preceding problem marries a color-blind man. a. What proportion of their sons will be color-blind? (Another way to think of this is to ask, What are the chances that their sons will be color-blind?) - b. Explain how a color-blind daughter might result from this couple.1. Windows peak (S) is dominant over straight hairline (s). Given that the mother has heterozygous gene pair for window's peak and the father has straight hairline. a. What is the genotype of the mother? b. What is the genotype of the father? * How many kinds of gametes can the mother produce? List them down. d. How many kinds of gametes can the father produce? List them down. e. Perform a cross using a Punnett square. f. Give the genotypic ratio of the cross g. Give the phenotypic ratio of the cross A 4.Which of the following genotype(s) must a female child have in order to be color blind? XNXN XNXn XnXn XNY XnY (XN represents the normal color vision allele. Xn represents the color-blindness allele. Y represents the Y chromosome, which does not carry the color-vision gene.) Which of the following genotype(s) must a color-blind male have? Explain your rationale. XNXN XNXn XnXn XNY XnY (XN represents the normal color vision allele. Xn represents the color-blindness allele. Y represents the Y chromosome, which does not carry the color-vision gene.)
- Two parents one heterozygous normal (Aa) and other is homozygous recessive albino (aa) 1.what is the percentage that their offspring will be normal? 2 .what is the percentage that their offspring will inherit albinism?a. The ability to taste the chemical phenylthiocarbamideis an autosomal dominant phenotype, and the inabilityto taste it is recessive. If a taster woman with a nontasterfather marries a taster man who in a previous marriagehad a nontaster daughter, what is the probability thattheir first child will be(1) A nontaster girl(2) A taster girl(3) A taster boyb. What is the probability that their first two childrenwill be tasters of either sex?9. Make a pedigree for each of the following situations. For each individual, write the individual's genotype (when possible) next to the individual's symbol (e.g. O xty, I Gg): a. Two parents do not have cystic fibrosis and they have a daughter with cystic fibrosis and a son who does not have cystic fibrosis. The daughter grows up and she mates with a male who does not have cystic fibrosis. Their only child is a boy and he has cystic fibrosis. b. A man with hemophilia mates with a female without hemophilia. They have one son and one daughter. The daughter has hemophilia and the son does not have hemophilia. The son grows up, and he marries and mates with a female. Their only child is a boy, and he has hemophilia.
