Concept explainers
a.
To determine: The possible genotype of both the parents for the given offspring.
Introduction: According to
b.
To determine: The possible genotype of both the parents for the given offspring.
c.
To determine: The possible genotype of both the parents for the given offspring.
d.
To determine: The possible genotype of both the parents for the given offspring.
e.
To determine: The possible genotype of both the parents for the given offspring.
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Biology - Study Guide
- Imagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the following experimental results in terms of numbers of plants are closest to what you expect in the F2 progeny? a. 8lOroundseeds b. 8lOwrinkledseeds c. 405:395 round seeds:wrinkled seeds d. 610:190 round seeds:wrinkled seedsarrow_forwardWhich of the following statements incorrectly illustrates incomplete dominance? Select one: a. Dark brown fur crossed with white fur produces yellow fur. b. Tall plants crossed with short plants produce medium height plants. c. A black horse crossed with a white horse produces a mixture of white and black hair in a horse. d. Red flowers crossed with white flowers produce pink flowersarrow_forwardIn tomatoes, tall (D) is dominant over dwarf (d) and smooth fruit (P) is dominant over pubescent fruit (p), which is covered with fine hairs. A farmer has two tall and smooth tomato plants, which we will call plant A and plant B. The farmer crosses plants A and B with the same dwarf and pubescent plant and obtains the following numbers of progeny: Q. Explain why different proportions of progeny are produced when plant A and plant B are crossed with the same dwarf pubescent plant.arrow_forward
- Two genes control color in corn snakes as follows:O– B– snakes are brown, O– bb are orange, oo B– areblack, and oo bb are albino. An orange snake wasmated to a black snake, and a large number of F1progeny were obtained, all of which were brown.When the F1 snakes were mated to one another, theyproduced 100 brown offspring, 25 orange, 22 black,and 13 albino.a. What are the genotypes of the F1 snakes?b. What proportions of the different colors wouldhave been expected among the F2 snakes if the twoloci assort independently?arrow_forwardIn four o’clock(a type of flowering plant), red color flowers exhibit incomplete dominance over white; when both exist together, the flowers are pink a) in a cross between a red flower and a white one, what is the genotype of the offspring? b) what is the genotypes ratio of the F2 generation of two of the F1 from (a) are crossed?arrow_forwardIn sesame plants, the one-pod condition (P) is dominant to the three-pod condition (p), and normal leaf (L) is dominant to wrinkled leaf (l). Pod type and leaf type are inherited independently. Determine the genotypes for the two parents for all possible matings producing the following offspring: 318 one-pod, normal leaf and 98 one-pod, wrinkled leaf. show your solution using punnet squarearrow_forward
- Gregor Mendel discovered the basis of heredity with his sweet pea plant experiments. In his studies, he determined that certain traits, such as pod color and pea shape, express complete dominance. A cross occurs between a plant with heterozygous yellow pods and wrinkled peas and a plant with green pods and heterozygous round peas. What is the probability that the offspring will exhibit recessive genes for both traits? A - 1/2B - 1/4C - 1/8D - 1/16arrow_forwardPetunia flower color is governed by two alleles, but neither allele is truly dominant over the other. Petunias with the genotype RR are red-flowered, those that are heterozygous (RW) are pink, while those with the (WW) genotype have white flowers. This is an example of incomplete dominance. a. If a white-flowered plant is crossed with a red-flowered plant, what is the genotypic ratio of the F1. b. What is the phenotypic ratio of the F1. c. If two of the F1 offspring were crossed, what phenotypes would appear in the F2?. d. What would be the genotypic ratio in the F2 generation?arrow_forwardTwo goats are mated together. One is tall and brown and of unknown genotype. The other is a short white goat. Assuming that tall (T) is dominant to short (t) and Brown (B) is dominant to white(b), what is the probability that they will produce a short, white offspring?arrow_forward
- In cultivated flowers called “stocks,” the recessive genotype of one locus (aa) prevents the development of pigment in the flower thus producing a white color. In the presence of the dominant allele A, alleles at another locus may be expressed as follows: B_ = red. bb = cream. a) When cream stocks of the genotype Aabb are crossed to red stocks of the genotype AaBb, what genotypic and phenotypic proportions are expected in the progeny? b) When dihybrid red stocks are crossed together, what phenotypic ratio is expected among the progeny? c) If red stocks crossed to white stocks produced progeny with red, cream and white flowers, what are the genotypes of the parents? Show the results of the cross based on your answer.arrow_forwardIn guinea pigs, short hair (S) is dominant to long (s). Black fur (B) is dominant to albino (b). A female from a strain which is pure breeding for black fur and short hair is mated to a male from a strain pure breeding for the albino condition and long hair. (A). What will be the phenotypes of the F1? (B) If members of the F1 are mated among themselves, what percentage of offspring can be expected to be homozygous for both traits? Give the genotypes and phenotypes of these homozygotes.arrow_forwardA spotted rabbit, when mated with a solid-colored rabbit, produced all spotted offspring. When these F1 rabbits were crossed among themselves, they produced 24 spotted rabbits and 8 solid-colored rabbits. About how many of the solid-colored F2 rabbits would be homozygous? What is the genotype of the parental generation? What is the genotypic ratio of the F1?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College