Dihybrid Cross Problem 2: When does a phenotype ratio of 9:3:3:1 occur? A phenotype ratio of 9:3:3:1 in the offspring of a mating of two organisms heterozygous for two traits is expected when: A. the genes reside on the same chromosome B. each gene contains two mutations C. the gene pairs assort independently during meiosis D. only recessive traits are scored E. none of the above

Dihybrid Cross Problem 2: When does a phenotype ratio of 9:3:3:1 occur? A phenotype ratio of 9:3:3:1 in the offspring of a mating of two organisms heterozygous for two traits is expected when: A. the genes reside on the same chromosome B. each gene contains two mutations C. the gene pairs assort independently during meiosis D. only recessive traits are scored E. none of the above

Name: Dihybrid CrossProblem 2: When does a phenotype ratio of 9:3:3:1 occur
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Description: Dihybrid CrossProblem 2: When does a phenotype ratio of 9:3:3:1 occur?A phenotype ratio of 9:3:3:1 in the offspring of a mating of two organismsheterozygous for two traits is expected when:A. the genes reside on the same chromosomeB. each gene conta

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 3TYK

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Female A Female C 1. Rabbits normally have 44 chromosomes. Rabbits with fewer chromosomes die before maturity. The Figure shows the process of meiosis in three rabbits. Male B a. In which parent did non-disjunction take place? 44 44 Chromosome Number MEIOSIS b. How many chromosomes would be in zygotes D, E, F? Indicate in the circles. 21 23 22 22 22 22 c. Name Process X. PROCESS X d. Which zygote would most likely be the healthiest? Explain why? Zygote D Zygote E Zygote F Figure 3: Rabbit Pedigree
1M sex cell 9. the passing of traits from parent to offspring 20. phenotype h. an egg or sperm 21, sex chromosomes i pair of chromosomes that determine the organism's sex 22. recessive trait j, an organism's inherited appearance 3. Children are born to a father that is heterozygous for widow's peak and a mother that hasE straight hairline, Show the following information. Parents: Genotypes: Phenotypes: Genotypic Ratio: Phenotypic Ratio: 4. Mom has type A blood and dad has type B. Show how they can have a child with type O blood. Parents: O Child's genotype:.
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X chromosome alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X chromosome allele, how many types or gametes can she produce with respect to that allele?
What genotypes, and in what frequencies, will be present in the offspring from the following matings? a. AABBaaBB b. AaBbaabb c. AaBBAABb d. AaBbAaBb
Assuming no gene linkage, in a dihybrid cross of AABB x aabb with AaBb F1 heterozygotes, what is the ratio of the F1 gametes (AB, aB, Ab, ab) that will give rise to the F2 offspring? a. 1:1:1:1 b. 1:3:3:1 c. 1:2:2:1 d. 4:3:3:1
h. After cytokinesis of meiosis II 4. In cats, blood type A results from an allele A which is dominant over an ;Ballele iB that produces blood type B. (there is no O blood as there in humans). The blood types of males and females cats that were mated and the blood types of their kittens are presented in the following table. Give the most likely genotypes for the parents of each litter. Male parent a. A b. B c. B d. A e. A f. A female parent B B A B A B Kittens 4 kittens type A, 3 kittens type B 6 kittens type B 8 kittens type A 7 kittens with type A, 2 kittens with type B 10 kittens with type A 4 kittens with type A, 1 kitten with type B
bob) ² most to RA turn pool bor r 11 GT OF Parent 1 Question 5. In a related species of dragons, the fire breathy and flying loci are present on the same chromosome. Non-dividing diploid cells from two dragons are shown above. Parent 2 o s mont iluess is vrogor add to koder sonst has susu boloibeng on a tad A. What is the genotype of parent 1? (Use chromosomal notation if appropriate) on Rr/11 B. What is the genotype of parent 2? (Use chromosomal notation if appropriate) L o noturno od to 200 200 and Rr/L C. Draw the what a cell from parent 2 would like in PROPHASE of MEIOSIS I. For the purpose of this question, ASSUME NO CROSSOVER between the fire breathing and flying loci. Make sure you label alleles on each DNA molecule. VL XL xr xr D. Draw what the two daugher cells would look like after the cell you drew in (C) has undergone meiosis I (the cells are ready to undergo meiosis II; assume no crossover between the indicated loci in meiosis I). Make sure you label alleles on each DNA…
1. Illustrate the crossovers of chromatids and the resulting gametic types of the given crossovers. 2. Identify the frequency for each type of recovered chromatids after the crossover. 3. Parental genotypes: homozygous dominant for 3 genes (AABBCC) homozygous recessive for 3 genes (aabbcc) Example: Single crossover between genes A and B of nonsister chromatids 2 & 3 Crossovers Gametic Genotypes Chromatids Recovered Parental Recombinant в B b. 2 2 a b. 1. SCO between genes B and C of nonsister chromatids 2 & 3 2. DCO between nonsister chromatids 2 & 3 3. DCO between 2 & 3; 1 and 3 4. DCO between 2 & 3; 1 & 4 5. DCO between 1 & 4; 2 & 3 6. DCO between 1 & 4; 2 & 4 7. DCO between 2 & 3; 1 & 2 8. DCO between 1 and 2; 3 & 4
For questions 1-3, consider a pea plant homozygous for tall stems and green seeds crossed with a plant dihybrid for tall stems and yellow seeds.
A. 1. Division of the cell nucleus, results in two daughter nuclei, each have the same number of chromosomes as the parent nucleus. 2. One two identical halves of a duplicated chromosome. 3. Fusion of haploid (n) gametes; results in the formation of a diploid (2)n zygote. 4. The breaking and rejoining of homologous (non sister) chromatids during early meiotic prophase I, resulting in an exchange of genetic material. 5. The diploid (2n) cell that results from the union of haploid (n) gametes in sexual reproduction. 6. The condition of having one set of chromosomes per nucleus. 7. The complex of DNA, proteins and some RNA that makes up eukaryotic chromosomes. 8. Structures in the cell nucleus, composed of chromatin and containing the genes. 9. An X-shaped site in a tetrad marking the location where homologous chromatids previously underwent crossing over. 10. A sex cell; in plants and animals, an egg or sperm. 11. Type of reproduction in which two gametes (usually, but not necessarily,…
a. The 2 daughter cells produced from meiosis I are IDENTICAL/UNIQUE (choose one) compared to each other. Explain how you determined the cells were genetically identical or unique. b. The daughter cells are HAPLOID / DIPLOID (choose one) because homologous pairs ARE/ARE NOT (choose one) present in the same cell. The chromosomes in each daughter cell are DUPLICATED/ UNDUPLICATED (choose one). essibility: Investigate D Focus 87% 58°F