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Concept explainers
(a)
To determine:
(a) All the possible genotype of mystery pea plant. (b) The cross that can be done to determine the exact genotype.(c) The way in which prediction can be done for the possible genotype and why that method is not called performing a cross. (d) The way in which the result of the cross and the prediction will help in determining the genotype of the mystery plant.
Introduction:
Genotype is the genetic makeup of an organism based on single or multiple traits. It helps in deciphering the type of progeny that would be observed in the future generations. The genotype determines the
To determine: All the possible genotype of a mystery pea plant.
(b)
To determine:
The cross that can be done to determine the exact genotype.
(c)
To determine:
The way in which prediction can be done for the possible genotype and why that method is not called “performing a cross”.
(d)
To determine:
The way in which the result of the cross and the prediction will help in determining the genotype of the mystery plant.
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Chapter 11 Solutions
Campbell Biology In Focus
- Solve these problems by listing the given genotypes, test crosses, genotypic and phenotypic ratios. 1. A plant with serrated leaf margins (A^aA^a) is crossed with a plant with smooth leaf margins (A^bA^b). What will be the phenotypic and genotypic ratios if a homozygous plant with serrated leaves is crossed with a plant with wavy leaves? Given: Test Cross: Genotypic Ratio: Phenotypic Ratio:arrow_forwardLet's do one more monohybrid cross. Suppose these is a gene in chickens that controls whether their eggs will be brown or white. Assuming that brown eggs (B) are dominant to white eggs (b), what are all of the phenotypes that would result from a cross between two chickens that are heterozygous for laying brown eggs? To get full credit for this question you will need to:a) List the parental genotypes and phenotypes.b) List the gametes produced by each parent.c) Do a punnet square. You can do this by inserting a 3x3 table. This tool can be found by clicking the waffle shaped icon under the bold "B" on the commands ribbon at the top of your answer box.d) List all of the possible genotype and phenotypes from the cross with numbers.arrow_forwardFigure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?arrow_forward
- For practice construct a Genetic map with three genes in Arabidopsis plants. A short plant (hy) is recessive to tall plant (HY), a red flower (r) is recessive to white flower (R); and long pollen (po) is recessive to oval shaped pollen (PO). You can come up with arbitrary number of progenies for each class of offspring (follow the numbers like in Fig. 7.14) ( please help, I dont understand what/how to do this)arrow_forwardPlease explain how I can solve this. Thank you You wanted to draw a linkage map for three genes in the fruit fly (A, B, C) that you suspect are linked. You have done a three-point testcross and found that out of the 1500 progeny in the cross, 612 are a · b · c, 603 are A · B · C, 93 are a · B · C, 85 are A · b · c, 53 are a · b · C, 47 are A · B · c, 5 are A · b · C, and 2 are a · B · c. From this data, you can deduce that the genes are linked and the distance between B and C is:arrow_forwardHelp mearrow_forward
- . The numbers of chromosomes in the somatic cells ofseveral oat varieties (Avena species) are: sand oats(Avena strigosa)—14; slender wild oats (Avenabarata)—28; and cultivated oats (Avena sativa)—42.a. What is the basic chromosome number (x) in Avena?b. What is the ploidy for each of the different species?c. What is the number of chromosomes in the gametesproduced by each of these oat varieties?d. What is the n number of chromosomes in eachspecies?arrow_forwardYou are handed a mystery pea plant with tall stems and axial flowers and asked to determine its genotype as quickly as possible. You know that the allele for tall stems (T) i dominant to that of the dwarf stems (t) and that allele for axial flowers (A) is dominant to that for terminal flowers (a).arrow_forwardYou have determined that the gene order for three linked genes being studied is A B C. The number of recombinants resulting from crossover between genes A and BC are 44 and 48, respectively, while the double-crossover progeny total 4 and 6. What is the recombination frequency between genes A and B if the total progeny from the cross is 1000? Show all of your work.arrow_forward
- True breeding eggplant plants producing deep, purple colored fruit are crossed with true breeding plants producing white fruit. The offspring of this cross all produce lighter, violet fruit. The colors of the fruit are produced by the interactions of the two different alleles. A.Predict the genotype of the F1 plant. B. Predict the expected proportions and genotypes in the F2 generation, if F1 eggplants are crossed.arrow_forwardIn peas, tall is dominant over dwarf. If a plant homozygous for tall is crossed with one homozygous for dwarf : a. What will be the genotype(s) (use the initial of your last name) and phenotype (s) of the F1 plants? b. If the F1 is grown the next season, predict the possible genotypes and phenotypes. c. If you cross the F1 to the tall parent, what phenotype will result of the cross? What will be the ratio of the genotype? d. If you cross the F1 to the short parent, what phenotype will result of the cross? What will be the ratio of the genotype?arrow_forwardMendelian Genetics F1 Cross: Tall, White, Axial x Dwarf, Violet, Terminal DdwwAA X ddWWaa Character: Stem height, Flower color & position Use fork-line method to check the F2. Show and interpret all the possible genotypes and phenotypes of the offsprings.arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
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