Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 3, Problem 14PDQ
When working out genetics problems in this and succeeding chapters, alwaysassumethatmembersof the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.
Mendel crossed peas with round, green seeds with peas having wrinkled, yellow seeds. All F1 plants had seeds that were round and yellow. Predict the results of testcrossing these F1 plants.
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When working out genetics problems in this and succeeding chapters, always assume that members of the P1 generation are homozygous, unless the information or data you are given require you to do otherwise.HOW DO WE KNOW? we focused on the Mendelian postulates, probability, and pedigree analysis. We also considered some of the methods and reasoning by which these ideas, concepts, and techniques were developed. On the basis of these discussions,
what answers would you propose to the followingquestion.
Question: Since experimental crosses are not performed in humans, how do we know how traits are inherited?
Required information
A single-factor cross is one in which the inheritance of only one character and its associated genotypes are followed.
Punnett squares are often used to predict the outcomes of simple genetic crosses. Based on Mendel's laws, the
genotypes of the parents can be used to predict the genes in their gametes and the resulting progeny. A Punnett square
enables you to predict the types of offspring the parents are expected to produce and in what proportions.
Sickle cell anemia is a recessive trait in humans. In a cross between two parents who are heterozygous for the gene, what are the gamete possibilities of the parer
Mother's gamete
possibilities
Father's gamete
possibilities
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Genetic Problems
Read the following genetic problems, and then complete the activities and questions for each problem
1. In the pea plant, the green pod color allele is dominant to the yellow pod color allele.
o Set-up a monohybrid cross between a pea plant that is heterozygous and a true-breeding yellow pod pea plant.
o What percentage of the offspring produced from this cross would you expect to have yellow pods?
2. Within a mouse population, the black fur allele (B) is dominant to the white fur allele (b) and the short whisker allele (S) is dominant to the
ngs
long-whisker allele (s).
o A heterozygous black-furred short-whiskered mouse is crossed with a homozygous white-furred long-whiskered mouse.
o What percentage of the offspring will be black-furred with long whiskers?
3. A physician is examining the blood types of children from a family.
o Child 1 has blood type AB, Child 2 has blood type B, Child 3 has blood type B, and Child 4 has blood type A.
o Based on the phenotypes of…
Chapter 3 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - CASE STUDY | To test or not to test Thomas first...Ch. 3 -
CASE STUDY | To test or not to test
Thomas...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 -
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When working out genetics problems in this and...
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When working out genetics problems in this and...Ch. 3 - When working out genetics problems in this and...Ch. 3 - Prob. 26PDQCh. 3 -
When working out genetics problems in this and...
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- Now cross two of the F₁ offspring. Parent 1 Gametes F2 Offspring Parent 2 Gametes 24. What is the phenotypic ratio in the F2 generation? 25. In the dihybrid cross you have considered two traits at a time. Although the number of traits has increased by one, what has happened to the number of possible phenotypes of offspring produced in the F2 generation? ni llit asa2013 bhidydenom sih at Simons 1:11 sabrax gatamearrow_forwardRequired information A heterozygous tall pea plant is allowed to self-fertillze. From the F1 progeny, a phenotyplcally tall plant was randomly chosen and mated to a phenotypically dwarf pea plant. What is the probability of producing any phenotyplcally dwarf plants from this mating? Multiple Choice 1/2 2/3 1/4 1/3 10 Show All MacBook Airarrow_forwardPLease help, double and triple check your answers, im using this to study, these questions are NOT graded they are PRACTICE problems. Please help with all 4 parts of this question!!!!!!! A. Your maternal grandpa is colorblind but both your mom and dad are not affected. What are the chances of your sister being colorblind? What are the chances of your brother being colorblind? (Colorblindness is X-linked recessive) B. Regarding the problem above, if your sister’s husband is colorblind, what are the chances that their first son will be colorblind? C. Two genes, A and X, exhibit incomplete linkage. The frequency of each parental gamete (AX and ax) is 45%. What is the approximate frequency of the Ax gamete? D. There are three genes located in the gene order A--B--C on a chromosome. Would you expect the recombination frequency to be higher between A and B or A and C?arrow_forward
- Question: On the basis of Mendel's hypothesis and observations, predict the results from the following crosses in garden peas: (a) a tall (dominant and homozygous) variety crossed with a dwarf variety: (b) the progeny of (a) selfed; (c) the progeny from (a) crossed with the original tall parent; (d) the progeny from (a) crossed with the original dwarf-parent variety.arrow_forwardDrosohpila Punnet Square of Crosses. I need results of F1 & F2 generation using Punnett Squares for: Make Punnet Squares of the following crosses •Drosophila Female wildtype cross Male White-eye •Drosophila Male wildtype cross Female White-eye •Drosophila Female Wild Type cross Male Scarlet Eye •Drosophila Male Wild Type cross Female Scarlet Eye Also, Which allele is heterozygous and which is homozygous, & which is dominant and which is recessive?arrow_forwardInstruction - Please answer them correctly - Please answer all of them, they are connected. PEDIGREE ANALYSIS and SYMBOLOGY Examine the pedigree which has X linked Dominant inheritance of disorder. Use letter X* (asterisk denotes disorder) as genotype of the individuals which can be XX, XY, X*X*, X*X and X*Y. a. What is the genotype of IV-6? b. What is the genotype of III-6? c. What is the genotype of II-3? d. What is the genotype of III-8? e. If couple I-1 and I-2 will have a son, what is the probability of having the disorder? f. If couple III-8 and III-9 will have another child, what is the probability of having the disorder? g. Theoretically, if individual IV-3 and individual IV-5 will marry and will have a child, what is the probability of having a child without the X-linked disorder?arrow_forward
- PEDIGREE PRACTISE PROBLEM The ability to roll your tongue is determined by the dominant gene (T). In the following pedigree, affected individuals CAN roll their tongue. Based on the pedigree, determine the genotype for each individual. I II IIIarrow_forward11:41 Cancel Markup Done Name: Date: Monohybrid practice problems In pea plants, the traits below exhibit the following dominance patterns: Recessive Expression: Wrinkled Dominant Expression: Round Purple |Yellow Inflated Green Trait: 1. Seed shape (R) 2. Flower color (P) 3. White Green Constricted Yellow Terminal Short Color of seed coat (Y) Form of ripe pods (I) 4. 5. |Color of unripe pods (G) 6. Position of flowers (A) 7. Length of stem (T) Axial Tall Record the genotypes for pea plants with the following descriptions (The first one has been done for you: 1. а. дg A plant with yellow pods A planteozygous for ereen pods С. A plant homozvaoue ta vellow seeds A plant with white flowers A plant with areen seeds 2. Complete the Punnett Square showing the cross between a pea plant with pure round seeds and a plant with wrinkled seeds. Summarize the phenotypes and genotypes for the offspring. Parental cross Genotypic Percentages: Phenotypic Percentages: 3. A pea plant with pure yellow…arrow_forward11:42 Cancel Markup Done Name: Date: Monohybrid practice problems In pea plants, the traits below exhibit the following dominance patterns: Recessive Expression: Wrinkled Dominant Expression: Round Purple |Yellow Inflated Green Trait: 1. Seed shape (R) 2. Flower color (P) 3. White Green |Constricted Yellow Terminal Short Color of seed coat (Y) Form of ripe pods (I) 4. 5. |Color of unripe pods (G) 6. Position of flowers (A) 7. Length of stem (T) Axial Tall Record the genetvnes f-Der-- = foltrawino deserintins (The first one has been done for you): а. дg A plant with yellow poás- EplancteOZygous for ereen pods N 0)e Owers С. A plant homozvaoue ycilow seeds A plant with white flowers TA piamt wilh areen seeds. Complete the Punnett Square showing the eress between a pea plant with pure round seeds and a plant with wrinkled seeds. Summanze the phenotypes and genotypes for the offspring. Genolynic PorcentadCS. Parental cross PhenolypicPerceniageS 3A pea plant with pure velow seeds is erossed…arrow_forward
- Chi Squared Problems In the garden pea, yellow cotyledon color is dominant to green, and inflated pod shape is dominant to the constricted form. Considering both of these traits jointly in self-fertilized dihybrids, the progeny appeared in the following numbers: 193 green, inflated 184 yellow constricted 556 yellow, inflated 61 green, constricted Do these genes assort independently? Support your answer using Chi-square analysis. (SOLVE USING EXCEL)arrow_forwardPractice Pedigree Problem help. I am confused so please show. Label Phenotypes and genotypes as you go about the Pedigree (and whatever else might be required)! Thank you again for your help, these questions confuse me). Hair or fur length in cats is controlled by a single, autosomal gene; the short hair-allele is dominant to the allele for long hair. Hair color is produced by a different gene which is located on the X chromosome. One allele for this sex-linked gene produces yellow, while an alternate allele produces black fur color; individuals which are heterozygous for these alleles are calico or tortiseshell in color. a). If a long-haired, black male is mated with a calico female homozygous for short hair, what kind of kittens will be produced in the F1generation? Give both genotypes and phenotypes; express the genotypes both symbolically and in words.arrow_forwardSchool - Dan. AClassroom What's Your Guardi. V Authentic Italian Re YouTube ver sheet ☆回 Add-ons Help Last edit was seconds ago BIUA Times New... - 14 1 .1 2 II| 4 5 Phenotype: % Go To Next Page 4. Cross a Green flower (YB) with another green flower. Y = yellow, B = Blue. Is this a codominant or an incomplete dominance problem? What is the probability of the offspring genotypes and phenotypes? (Use a Punnett Square and make a table as seen in the problems above to give genotypes and phenotypes) Genotype: edu gear lii lilıarrow_forward
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