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- Assumptions: . If the parent expresses the trait, they are homozygous dominant If the child/children express the trait but the parents do not, the parents are heterozygous. Traits selected: Brown Hair/Eyes And Widows Peak Write the Letters you will be using n the Punnet square for each trait: _Ww Bb_and_ww Bb_ Father Genotype: WW Bb Mother Genotype: ww Bb Parent Gametes possible gametes: possible gametes: Do you have the phenotype of either of the traits in the cross? If you do, which one? Are there any other offspring with either trait? Which trait? Which phenotypic probability did you fall into? Which phenotypic probability did other offspring fall into? IDirection: Answer the following problems: 1. Predict the phenotypic ratios of offspring when a homozygous white cow is crossed with a roan bull. Illustrate using a Punnett square. 2. Complete the Punnett square for a cross between a black chicken (BB) and a white chicken (WW). Give the phenotype of the offspring in the F1 generation. Кey BB – black ww- white F1 BW – checkered Phenotype: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.
- 25. List the three alleles for blood: 26. List the genotypes for blood: 27. List the phenotypes for blood: 28. A type of chicken shows codominance with black (B) being codominant with white (B'). The heterozygous condition is checkered. Cross a checkered rooster with a white hen. Show the following: Genotypes: Phenotypes: Genotypic Ratio: Phenotypic Ratio:B What is the genotype ratio? What is the phenotype ratio? 3. What are the expected genotype and phenotype ratios in the following genetic conditions? Use scratch paper to do the Punnett square if needed but you do not need to draw it on the worksheet. a. Monohybrid cross between 2 heterozygous individuals (Aa x Aa) Genotype ratio: 1:2:1 Phenotype ratio: 3:1 G q 8:32 a b. Dihybrid cross between 2 heterozygous individuals (AaBb x AaBb) Genotype ratio: Phenotype ratio: 4. Both Mrs. Smith and Mrs. Jones had babies the same day in the same hospital. Mrs. Smith took home a baby girl, whom she named Sharon. Mrs. Jones took home a girl, whom she named Jane. Mrs. Jones began to suspect, however, that the child had been accidentally switched with Mrs. Smith baby in the nursery. Blood test were made; Mr. Smith was type A, Mrs. Smith was type B, Mr. Jones was type A, Mrs. Jones was type A. Sharon was type O, and Jane was type. B. Had a mix-up occurred? Use scratch paper, you do not need to…3. Set up a Punnett square using the following information: Dominate allele for purple corn kernels = R Recessive allele for yellow corn kernels =r Dominate allele for starchy kernels = T Recessive allele for sweet kernals =t Cross a homozygous dominant parent with a heterozygous parent. Using the Punnett square above: a. What is the probability of producing purple, starchy corn kernels? Possible genotype(s)? b. What is the probability of producing yellow, starchy corn kernels? Possible genotype(s)? c.What is the probability of producing purple, sweet corn kernels? Possible genotype(s)? d. What is the probability of producing yellow, sweet corn kernels? Possible genotype(s)?
- 1 . 3 Below are the results of some blood tests and you need to compare the child's blood type to the parent's blood type and confirm paternity. If there is no way that parents with the indicated blood types could give rise to a child with the child's blood type write 'No'. If it is possible write 'Yes' and include the parent's genotypes. Child Mom and Dad Possible? If Yes Ogenotypes AB and B O. A and B AB and A АВ A and O A and B 2.|Users Edio Calendar Edio Calendar x RepostExchau 53/assessments/424083/variants/614170/take/8/ A Q 4 F SKETCHPAD Question 11 Lee Ann has two fish. One is heterozygous for orange color, and the other is homozy- gous recessive for black color. Lee Ann decides she wants to breed her fish, but she wants to know ahead of time how many fish of each color to expect. Construct a Punnett square that shows the cross between Lee Ann's fish. Use the geno- types you determined in questions 9 and 10 to help you. R = Orange r= black3 IIO 1 III 2 1 3 2 3 4 1. Is this trait dominant or recessive? Explain your answer. 3 5 4 6 7 2. What gave you the essential information to decide that II-3 and II-4 were heterozygous? 6 7 8 8 4. Draw a pedigree (info above) showing all four grandparents, the two parents, and the son. Indicate each individual's possible genotypes. 9 3. Brown eyes are a dominant eye-color allele and blue eyes are recessive. A brown-eyed woman whose father had blue eye and whose mother had brown eyes marries a brown-eyed man whose parents are also brown-eyed. They have a son who is blue- eyed.
- https://www. Homozygous or Heterozygous 1. Bb 2. FF 3. DD 4. Rr Genotypes and Phenotypes 5. Tt 6. Qq 7. Long nose 8. Н 9. Brown hair Punnett Square B = Purple Hair %3D b = Yellow Hair %3D re to search[Type here] 8. Using the letter "A", write the genotype(s) for a homozygous trait. a. Write the genotype(s) for a heterozygous trait. 9. Using the letter "B", write the genotype(s) for a dominant trait. a. Write the genotype(s) for a recessive trait. Complete the Punnett Square using the information provided. Grey fur is dominant to white fur. Red eyes are dominant to black eyes. F = Grey Fur f = White Fur E = Red eyes 10. The bunny is heterozygous for gray fur. Write her genotype. braM e = Bla5. When two alleles are observed independently in a phenotype is called multiple alleles. Human blood group ABO is a good example of multiple alleles. The three alleles are: I^, IB, i. Mother's blood type is AB (IAIP) and father's blood type is B (1³i). Provide the genotype and phenotype ratios using the Punnett square given below. Genotypes 6. When the allele of a trait is found on X or Y chromosome, it becomes sex-linked. The results differ from males to females. One such example is of red green colorblindness. The mother is a carrier (XCX), and the father is colorblind (XY). Provide the genotype and phenotype ratios using the Punnett square given below. Genotypes Phenotypes **CLUSTROS Phenotypes 75-1024