white b. light black c. medium TA I. X-LINKED OR SEX-LINKED TRAITS A color-blind man marries a woman wit blind. Use aXfor normal vision, and al X for color-blindness, (Remember where sex-linked traits are carried). What is the genotype of the ma al vision, whose father was color- h norm type of the manand woman? Use a Punnett square to show the phenotypes of their progeny 172
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- 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?Sex-Linked: Cross a colorblind woman with a normal vision man and determine phenotype ratio. XX- normal female XY normal male X*X carrier female X*Y color blind male X*X* colorblind femaleG Describe Muller's Ratchet-Googl x nooreps.owschools.com/owsoo/studentAssignment/index?eh=310247513 Asslgnment -6. Mendelian Genetics Attempt 1 of 2 ASSIGNMENTS COURSES SECTION 7 OF 8 « < 4 5 8. 9. 10 11 12 13 14 Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into correct position in the answer box. Release your mouse button when the item is place. If you change your mind, dra the item to the trashcan. Click the trashcan to clear all your answers. Make a Punnett Square for two smooth seed hybrid pea plants (Ss) Click once to select an item at the bottom of the problem. Click again to drop the item in its correct place. S SS Ss SS S
- .Certain forms of human color blindness are inherited as X-linkedrecessive traits. Hemizygous males are color-blind, but heterozygous females are not. However, heterozygous females sometimeshave partial color blindness.A. Discuss why heterozygous females may have partial color blindness.B. Doctors identified an unusual case in which a heterozygousfemale was color-blind in her right eye but had normal colorvision in her left eye. Explain how this might have occurred.Analysis of X-Linked Dominant and Recessive Traits A young boy is color-blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles children or grandchildren is color-blind. One of the maternal aunts married a color-blind man, and half of her children, both male and female, are color-blind. The other aunts married men who have normal color vision. All their daughters have normal vision, but half of their sons are color-blind. a. Which of the boys four grandparents transmitted the gene for color blindness? b. Are any of the boys aunts or uncles color-blind? c. Is either of the boys parents color-blind?r blindness is recessive, x-linked trait. Ia marriages between a man who is colorblind and a woman a carrier what percentage of the children can be expected to be sons who are not color blind? What entage of the children can be expected to be daughters who are carriers? What percentage of the children can be expected to be daughters who are not carriers at all? 42 Se
- i). pronde. clear- cut. explenations.in differences/Similarīties, if ony, between." Extensnons of mendelren. mhentonce Vs. Non.- mendellen. nhentnce.2/7 - <. Hair texture is an incompletely dominant trait in humans. The three phenotypes are curly, wavy and straight. Straight only occurs when both parents have straight hair. Curly hair also tends to follow this pattern. Only two wavy haired parents produce all three phenotypes. Please explain this observation using punnett squares. Curly x Curly straight x straight Wavy x wavyPart B. Write the genotype for each individual person using H and h to represent the alleles. Remember to use a H? if you cannot determine what the genotype is for person with the dominant trait.
- I. Perform the indicated single-gene and two-gene crosses. Show all work. Show all Punnett squares. List the gene or genes involved, list and define all allele symbols, and indicate the genotypes of the individuals you are crossing above the Punnett square. Answer questions that ask for a ratio as a ratio and questions that ask for a percent as a percent. In humans, albinism is a recessively determined trait. One form of hereditary deafness is also a recessive trait. Show the cross of a man who is heterozygous for skin pigmentation and heterozygous for hereditary deafness with a woman who is albino and deaf. Show the expected phenotype ratio of the offspring.Albinism is a recessive autosomal trait for skin pigmentation. Hemophilia is a sex-linked recessivedisorder of the blood. assign alleles to the traitsA – normal skin pigmentation X H – normal blooda – albino X h - hemophilia A double heterozygous woman marries a non-hemophilic man and heterozygous for skinpigmentation. Double heterozygous means heterozygous for both traits. Aa for skin pigmentation andX H X h for blood trait. Therefore, the genotype of the woman is AaX H X h . Non-hemophilic man is X H Y and heterozygous for skin pigmentation is Aa. The genotype,therefore, of the man is AaX H Y. What is the probability that they will have:a. a child with normal skin? _____________________b. a child with normal blood? _____________________c. an albino girl? _____________________d. A hemophilic boy? _____________________I. White eye cross White eye color is a recessive trait found on the X chromosome. Also called Sex-linked. This is called sex-linked. Gene symbols Xw White eye color X normal red eye color Y it’s a boy The parents were White eye color female XwXw and red eye color male XY Diagram of P1 cross: You are crossing XwY and XXw (figure out the phenotype) Diagram of F1 cross: Give expected F2 phenotypic ratio: Give expected F2 genotypic ratio: