PROBLEM 1. In a certain plant, yellow fruit, Y, is dominant to white fruit, y. A heterozygous plant with yellow fruit is crossed with a plant with white fruit. Determine the probable genotypic and phenotypic ratios resulting from this cross. Determine the probable genotypic and phenotypic ratios expected from crossing two heterozygous plants of Problem 1. Show your complete solutions (Pu

PROBLEM 1. In a certain plant, yellow fruit, Y, is dominant to white fruit, y. A heterozygous plant with yellow fruit is crossed with a plant with white fruit. Determine the probable genotypic and phenotypic ratios resulting from this cross. Determine the probable genotypic and phenotypic ratios expected from crossing two heterozygous plants of Problem 1. Show your complete solutions (Pu

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter13: Observing Patterns In Inherited Traits

Section: Chapter Questions

Problem 10GP: Red-flowering snapdragons are homozygous for allele RI. White-flowing snapdragons are homozygous for...

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Dihybrid Cross Problem Set Problem 13: AaBb dihybrid cross involving epistasis. Two unlinked loci effect mouse hair color. AA or Aa mice are agouti. Mice with genotype aa are albino because all pigment production is blocked. regardless of the phenotype at the second locus. At the second locus, the B allele (agouti coat) is dominant to the b allele (black coat). What would be the result of a cross between two agouti mice of genotype AaBb? A. 4 agouti: 4 black: 8 albino B. 9 agouti: 3 black: 3 albino: 1 grey C. 9 agouti: 3 black: 4 albino D. 8 agouti: 4 black: 4 albino
Problem 2: In summer squash, white fruit is dominant to yellow, and flat fruit is dominant to round. The selected parents are a plant with white-flat fruit (homozygous) and a plant with yellow-round fruit. Carry this cross through the F₂ generation. List phenotypic ratio for the F, generation. Problem 3: Persian cats have the dominant gene for black coat and the recessive gene for long hair. Siamese cats have the recessive gene for tan coat and the dominant gene for short hair. A pure-breeding black, long hair Persian cat is mated with a pure-breeding tan, short hair Siamese. Calculate the F, and F₂ generations. List the phenotypic ratio for the F₂ generation. Show your calculations in the space below.
Problem 3: In snapdragons, the inheritance of flower color and size of leaves are examples of Incomplete Dominance. When red flowered plants are crossed with white, the offspring have pink flowers. Similarly, when a plant with broad leaves is crossed with plants having narrow leaves, the offspring have intermediate leaves. Regarding a cross between a homozygous red-flowered, broad- leaved plant with a homozygous white-flowered, narrow-leaved plant. What are the phenotypes and their ratio in the F1 generation? Construct a Punnett square. What are the phenotypes and their ratio in the F2 generation? Construct a Punnett square.
An a cross between two true-breeding plants, Parent #1 with yellow, round peas and Parent #2 with green, wrinkled peas, 1. a. What is the genotype of each plant in the cross. What proportion of the F1 progeny will have the same phenotype as Parent #2. After you self the F1s, what proportion of the progeny will have the same phenotype as Parent #1. C. What proportion of the progeny will have the same genotype as Parent # 1. d. b.
Practice with Crosses. Show all work! 6. A TT (tall) plant is crossed with a tt (short plant). a. What percentage of the offspring will be tall? 7. A Tt plant is crossed with a Tt plant. a. What percentage of the offspring will be short? 8. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). a. What percentage of the offspring will be homozygous (RR)? 9. A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. a. What percentage of the offspring will also be homozygous?
Problem #3 In some plants, green pod color (G) is dominant to yellow pod color (g). If an individual that was heterozygous for green pods were crossed with one that was homozygous for green pods, identify the genotype and phenotype ratios of the offspring. P Genotypic Ratio: Phenotypic Ratio:
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 SQUARE
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.
Problem 1: A pet storeowner mated two guinea pigs with the following results 22 black offspring 5 white offspring He then mated two of the black offspring and got the following results: 16 black offspring 3 white offspring What is the genotype of the parents used in the first cross? What is the genotype of the parents used in the second cross? What is the chance of obtaining a totally homozygous offspring in the second cross? If the white offspring were crossed with the original parents, what would be the probability of obtaining white offspring? What would be the chance of obtaining a homozygous black offspring?
be holding online office hours Tuesday morning. Background to Problems 1 and 2. When a fly (Drosophila) strain with round, brown eyes was crossed to a different strain with kidney-shaped, red eyes, all F1 flies had eyes that were round and red. When these Fi flies were test crossed (i.e., mated to a suitable test strain), there were four distinct eye phenotypes observed in the F2, all at approximately the same frequency (i.e., ~ 25% each), namely: 1) round & red; 2) round & brown; 3) kidney-shaped & red; and 4) kidney-shaped & brown. 1) How many different genes (each with two alleles) control the eye phenotype in this example? 2) What was the phenotype of the test strain flies?
In garden peas, tall (T) vine is dominant over short (t) vine. Yellow (Y) seed color is dominant over DIHYBRID GENETICS PROBLEMS Name 1. plant. Show the genotypes and phenotypes of the Fi offspring, and the probability of eac Genotype of the homozygous tall, round pea plant Genotype of the homozygous short, wrinkled pea plant. Phenotypes Genotypes 2. green (y) seed color. Cross a heterozygous tall, vellow seeded plant with a heterozygous tall, yeno seeded plant. Genotypes of the parent plants Genotypes Phenotypes What is the probability for a tall offspring? What is the probability for a short offspring? What is the probability for a yellow offspring? What is the probability for a green offspring? What is the probability for a tall yellow offspring? What is the probability for a tall green offspring? What is the probability for a short yellow offspring? What is the probability for a short green offspring?
Red-flowering snapdragons are homozygous for allele RI. White-flowing snapdragons are homozygous for a different allele (R2). Heterozygous plants (R1 R2) bear pink flowers. What phenotypes should appear among first-generation offspring of the crosses listed? What are the expected proportions for each phenotype? a. R1R1 R1R2 b. R1R1 R2R2 c. R1R2 R1R2 d. R1R2 R2R2