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- PROBLEM 2: A homozygous red flowered plant (RR) is crossed with a homozygous white plant (rr). Justify your answer by using Punnett Square. a. What are the genotypes and phenotypes of the offspring? b. What are the phenotypes and genotypes of the offspring? c. What is the probability of having a white flower? d. What is the probability of having a red flower? e. PUNNETT SQUAREProblem 2: In horses, black coats and trotting gait are dominant while the recessive alleles are white and pacing gait. If the male is homozygous for both dominant traits, what is the genotype of the male? Regarding a cross between the homozygous male with the homozygous recessive female. What are the phenotypes and their ratio in the F1 and F2 generations?ALL WORKING MUST BE SHOWN Problem 3) Butterflies show 3 phenotypes due to incomplete dominance at the D locus with alleles D' and DB giving green phenotype in heterozygotes and yellow and blue in homozygotes a) A population of butterflies showed 49% yellow, and 51% blue and green. What percentage of the gametes for the next generation would contain the DB allele? b) In another population only 1% of the butterflies are blue, What is the DY allele frequency? c) If the butterflies were subject to predation by birds that could easily detect blue & yellow individuals what effect would you expect this to have on the genotype and allele frequencies over time? Indicate possible percentages.
- Monohybrid Practice Problems For each of the following, show the Punnett Square and give the Genotype AND Phenotype for each on your own paper! 1. In human, brown eyes are dominant over blue eyes. What type of offspring would you expect if you crossed a heterozygous brown eyed person to a heterozygous brown eyed person? 2. A widow's peak hairline is dominant to straight hairline. Cross a heterozygous widow's peak hairline person to a straight hairline person. 3. In humans premature gray hair is dominant over normal hair coloring. Cross a homozygous premature gray haired person to a homozygous normal haired person. 4. In humans tongue rolling is dominant to non-tongue rolling. What would be the expected type of offspring if a homozygous tongue roller was crossed to a heterozygous tongue roller? 5. Brown hair is dominant over light colored hair. Cross two light haired people. 6. In a certain plant yellow fruit is dominant to white fruit. A heterozygous plant with yellow fruit is crossed…Classical Genetics Group Practice Problems Practice Problems 1. In guinea pigs, black fur is dominant to white fur. Assign a symbol for each allele: black = white = Use a Punnett square to determine the genotypic and phenotypic ratios for each of the following crosses. Show all work. a) P: heterozygous black X white b) P: heterozygous black X heterozygous blackProblem 9: Albinism is inherited as an autosomal recessive. In the figure below, assuming that persons from the general population are not heterozygous for albinism (Aa), what are the genotypes of all persons whose genotypes are known? (i.e., indicate the genotypes on the figure for all known AA, Aa, and aa individuals) 어ㅁ ㅁㅇㅇㅁ 라이 ㅇㅇㅇㅇㅇㅇㅇㅇㅇㅇㅇㅁ ㅇㅇㅁㅁ 58 o
- Problem #4 In some plants, having brown seeds (B) is dominant to having white seeds (b). What are the genotype and phenotype ratios that would be expected from a cross between an individual that is homozygous for brown seeds and one that has white seeds? P Genotypic Ratio: Phenotypic Ratio:PROBLEM 3: Using the Punnett square, determine the different combination of gametes with the genotypes G9MM (paternal) and ggmm (maternal). G is dominant for having a widows peak and g is recessive for not having a widow's peak. M is dominant for having the ability to roll the tongque and m is recessive for not having the ability to roll the tongue. Determine the following: a. What are the offsprings phenotype: b. What are the offsprings genotype: c. Probability of widow's peak and can tongue roll d. Probability of offspring with no widow's peak but can roll its tonque e. PUNNETT SQUAREProblem 1 In sheep, the allele for black wool (B) is dominant over the allele for white wool (b). Similarly, the allele for horns (H) is dominant over the allele for being hornless (h). Pure breeding horned sheep with black wool were crossed with pure breeding hornless sheep with white wool. 1. State the genotype and the phenotype of the F1 individuals produced as a result of this cross. 2. Two F1 offspring were mated together. Calculate the expected ratio of phenotypes in the F2 generation.
- Problem 4: In Andalusian fowls, the heterozygous condition for the alleles of black plumage and white plumage is blue plumage. What offspring will a blue Andalusian rooster have if bred to birds of the following plumage: black plumage blue plumage white plumage Diagram the three crosses. List the probability of each of the three types of plumage occurring.Problem 1. Tallness is a dominant trait and shortness is a recessive trait in a pea plant species. If you cross two heterozygous plants, what will be the genotypes and phenotypes of the offspring? What will be the genotypic and phenotypic ratios? a) Construct a Punnett Square - List gametes in the area with the dashed line and the genotypes of the offspring in the area with the sold line. b) Genotypes of Offspring- c) Phenotypes of Offspring- d) Genotypic Ratio of Offspring- e) Phenotypic Ratio of Offspring-Background Problem N° 6 Objective: To illustrate the differences between the dominant/recessive model vs. partial (or incomplete) dominance model. In incomplete dominance, the phenotype is neither dominant nor recessive, but intermediate instead. a. Explain why a monohybrid cross of snapdragon plants carrying white flowers with red-flowered plants produces all pink flowers in the F1 generation. [Hint: What makes flowers red, purple, yellow, etc.?] b. What are the genotypic and phenotypic ratios of snapdragon flowers in the F2 generation? True breeding individual = Homozygous for either trait.