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Genetic Analysis: An Integrated Approach (3rd Edition)
- Which of the following represents the correct phenotypes of the F2 offspring? Select one: a. Phenotype Single Walnut Pea Rose 9/16 3/16 3/16 1/16 b. Phenotype Single Walnut Pea Rose 3/16 9/16 1/16 3/16 c. Phenotype Single Walnut Pea Rose 1/16 9/16 3/16 3/16 d. Phenotype Single Walnut Pea Rose 3/16 1/16 9/16 3/16arrow_forwardThe genes for tall vine D and yellow seed G, are dominant over their respective alleles for dwarf d and green g. What phenotypes are expected from each of the following crosses? Include phenotypic and genotypic ratio. Use Punnet square to show the ff. Crosses. a. Heterozygous tall, homozygous yellow X Homozygous Tall, heterozygous yellow. b. Homozygous Dwarf, heterozygous yellow X Heterozygous tall, homozygous greenarrow_forwardIn cattle, black wool color W is dominant over white w, the heterozygous being roan. In the following crosses, the genotypes of the parents are given. Give the types of gametes produced by each parent and the phenotypic ratio of each cross. Provide your solution. a. WW x Ww b. Ww x ww c. Ww x Ww d. WW x WWarrow_forward
- A tall pea plant with purple flowers (both determined by dominant alleles) is crossed with a short plant with white flowers. there is no linkage of genes. if the tall, purple-flowered plant is heterozygous for both traits, the offspring will be: A 1 purple tall:1 white short B 3 purple tall:1 white short C 9 purple tall:3 purple short:3 white tall:1 white short D 1 purple tall:1 purple short:1 white tall:1 white shortarrow_forwarda. State a hypothesis explaining the inheritance of flower color in painted tongues. b. Assign genotypes to the parents, F₁ progeny, and F2 progeny for all five crosses. c. In a cross between true-breeding yellow and true-breeding lavender plants, all of the F1 progeny are bronze. If you used F₁ plants to produce and F2 generation, what phenotypes in what ratios would you expect? Are there any genotypes that might produce a phenotype that you cannot predict from earlier experiments, and if so, how might this alter the phenotypic ratios among the F2 progeny?arrow_forwardFor pea plants with the following genotypes, list the possible gametes that the plant can make:A. TT Yy Rr C. Tt Yy RrB. Tt YY rr D. tt Yy rrarrow_forward
- For the cross: PpAa x PpAa P = purple flowers (Dominant) p = white flowers A = axial flowers (Dominant) a = terminal flowers a. What are the possible gamete classes that can form from these parents? b. What are the expected offspring genotype classes and ratios/proportions/fractions which will result from the cross? c. What are the expected offspring phenotype classes and ratios/proportions/fractions which will result from the cross? 2. Predict ratios/proportions/fractions of genotypes and phenotypes of the following crosses. T = tall stem t = dwarf stem P = purple flowers p = white flowers G = green pods g = yellow pods A = axial flowers a = terminal flowers R = round peas r = wrinkled seeds A. ttPp x Ttpp B. GgRr x ggRr C. PpGg x ppggarrow_forwardDuring a dihybrid cross involving two linked genes (two-point testcross), 20 flies showed recombinant phenotypes, whereas 480 flies showed the parental phenotypes. How far apart are these linked genes from each other? a. 20 cM b. 7.5 cM c. 4 cM d. 0.04 cM e. 8 cMarrow_forwardA cross is made between a heterozygote, +++/abc, and a recessive homozygote, abc/abc. Analysis of the progeny gave the following results: 450 10 a + c 70 + b c 210 + b + 65 a + + 200 abc 460 ab+ 15 What is the map distance between the b and c genes? O9.12 map units O 10.81 map units O 12.14 map units O 13.95 map units ONone of the above PrtScn Home End %23 %24 & 7. 3. 4. 7 W R Y H. K C V この #:arrow_forward
- Use the image to observe the results of a cross between a tall pea plant and a short pea plant. What phenotypes and proportions will be produced for the two crosses? P generation Tall Tt Gametes Tt F₁ generation T Fertilization Tt t Tall tt Short Tt Tall tt tt Short Conclusion (a) Short (b) Genotypic ratio 1Tt:1tt Phenotypic ratio 1 tall: 1 short Tall F₁ progeny backcrossed to the short parent Answer Bank one-fourth tall and three-fourths short one-half tall and one-half short three-fourths tall and one-fourth short Tall F₁ progeny backcrossed to the tall parent all tall all shorarrow_forwardIf a two-point testcross of heterozygous females and homozygous-recessive males in Drosophila results in a calculated map distance of 10 cM between the two genes, the offspring of the cross must have shown four phenotypes in a ratio of a. 9:3:3:1 b. 1:1:1:1 c. 19:19:1:1 d. 3:3:1:1 e. 9:9:1:1arrow_forwardshows the results of a cross between a tall pea plant and a short pea plant. a. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the short parent? b. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the tall parent?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College