Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 2, Problem 19P
If two six-sided dice are rolled, what is the probability that the total number of spots showing is
(a) 4?
(b) 7?
(c) greater than 5?
(d) an odd number?
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Describe the application of item (a) to the provided item (b).
-(a) sum rule in (b) identifying the probability of Bb from the cross Bb×Bb
-(a) the forked-line method in (b) identification of genotypes of a cross
You cross a true-breeding yellow-bodied, smooth-winged female fly with a true-breeding red-bodied, crinkle-winged male. The red body phenotype is dominant to the yellow body phenotype and smooth wings are dominant to crinkled wings. Use B or b for body color alleles, and W or w for wing surface alleles.(4 points)
a) What are the genotypes of the P generation flies?
b) What will be the genotype(s) and phenotype(s) of the F1 offspring?
c) You discover that the genes for body color and wing surface are linked. You perform a dihybrid test cross between the F1 flies from part (b) with a true-breeding yellow-bodied, crinkle-winged fly. Use the following results of this cross to determine the recombination frequency (%) between the body color and wing surface genes. (Remember that the recombinants are the ones that do not resemble the parental types from the P generation.)
Body Color Wing Surface # of Individuals
red smooth 102
yellow smooth 404
red crinkled 396
yellow crinkled…
(D) 1/6
(E) 1/64
26. In sheep, eye color is controlled by a single gene with two alleles. When a homozygous
brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue-eyed offspring
are produced. If the blue-cyed sheep are mated with each other, what percent of their
offspring will most likely have brown eyes?
(A) 0%
(В) 25%
(C) 50%
(D) 75%
(E) 100%
27. In peas the trait for tall plants is dominant (T) and the trait for short plants is recessive (t).
The trait for yellow seed color is dominant (Y) and the trait for green seed color is
recessive (y). A cross between two plants results in 296 tall yellow plants and 104 tall
green plants. Which of the following are most likely to be the genotypes of the parents?
(A) TTYY x TTYY
(В) Туу х ТТYу
(C) TIYY x TIYy
(D) TIYy x TTYY
(E) TtYY x Ttyy
28. In humans, red-green color blindness is a sexlinked recessive trait. If a man and a woman
produce a color-blind son, which of the following must be true?
(A) The father is color-blind.
(B)…
Chapter 2 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 2 -
1. Compare and contrast the following terms:
a....Ch. 2 - For the cross , what is the expected genotype...Ch. 2 - 37. Galactosemia is an autosomal recessive...Ch. 2 - In mice, black coat color is dominant to white...Ch. 2 - Two parents plan to have three children. What is...Ch. 2 - Consider the cross AaBbCCAABbCc. a. How many...Ch. 2 - If a chi-square test produces a chi-square value...Ch. 2 -
8. Determine whether the statements below are...Ch. 2 - In the datura plant, purple flower color is...Ch. 2 - 10. The dorsal pigment pattern of frogs can be...
Ch. 2 - 11. Black skin color is dominant to pink skin...Ch. 2 - A male mouse with brown fur color is mated to two...Ch. 2 - 13. Figure 2.12 shows the results of Mendel’s...Ch. 2 - 14. An experienced goldfish breeder receives two...Ch. 2 -
15. The accompanying pedigree shows the...Ch. 2 -
16. A geneticist crosses a pure-breeding strain...Ch. 2 - Suppose an F1 plant from Problem 16 is crossed to...Ch. 2 - 18. In pea plants, the appearance of flowers along...Ch. 2 - 19. If two six-sided dice are rolled, what is the...Ch. 2 - Experimental Insight 2.1 describes data, collected...Ch. 2 -
21. The accompanying pedigree shows the...Ch. 2 - 22. The seeds in bush bean pods are each the...Ch. 2 - List all the different gametes that are possible...Ch. 2 - Organisms with the genotypes AABbCcDd and AaBbCcDd...Ch. 2 -
52. In humans, the ability to bend the thumb...Ch. 2 - In the fruit fly Drosophila, a rudimentary wing...Ch. 2 - In pea plants, plant height, seed shape, and seed...Ch. 2 - A variety of pea plant called Blue Persian...Ch. 2 - 29. In tomato plants, the production of red fruit...Ch. 2 - A male and a female are each heterozygous for both...Ch. 2 - 31. In a sample of families with children each,...Ch. 2 - Prob. 32PCh. 2 - A woman expressing a dominant phenotype is...Ch. 2 - Two parents who are each known to be carriers of...Ch. 2 - 33. An organism having the genotype AaBbCcDdEe is...Ch. 2 - 34. A man and a woman are each heterozygous...Ch. 2 - For a single dice roll, there is a 16 chance that...Ch. 2 - You have four guinea pigs for a genetic study. One...Ch. 2 - 37. Galactosemia is an autosomal recessive...Ch. 2 - Sweet yellow tomatoes with a pear shape bring a...Ch. 2 - A cross between a spicy variety of Capsicum annum...Ch. 2 - Alkaptonuria is an infrequent autosomal recessive...Ch. 2 - 41. Humans vary in many ways from one another....Ch. 2 - 42. In chickens, the presence of feathers on the...Ch. 2 -
43. A pure-breeding fruit fly with the...Ch. 2 - 44. Situs inversus is a congenital condition in...Ch. 2 - 45. Domestic dogs evolved from ancestral grey...Ch. 2 - Alleles of the IGF-1 gene in dogs, encoding...Ch. 2 - 49. The Basalt Seed Lending Library run by the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In humans, cystic fibrosis is a disease caused by a recessive allele (). Individuals with normal (wildtype) phenotype have the genotype (F). If two heterozygous individuals marry and have 8 children, what is the probability that: a) four will be normal and four will have cystic fibrosis? b) one will have cystic fibrosis and seven will be normal? c) All eight children will have cystic fibrosis?arrow_forwardA) Two linked genes, (A) and (B), are separated by 18 cM. A XY individual with genotype Aa Bb (trans) mates with a XX individual who is aa bb. What is the probability that their first two children will both be aabb? a) 0.168 b) 0.0081 c) 0.032 d) 0.062 e) none of the above B) Two linked genes, (A) and (B), are separated by 18 cM. A XY individual with genotype Aa Bb (their mother was aabb) mates with a XX individual who was aa bb. What is the probability their first child will be Aa Bb? a) 0.18 b) 0.41 c) 0.09 d) 0.25 e) 0.50arrow_forwardIf a Mother's genotype is IAi and her Daughter's genotype is ii and the mother claims a man who is type B as the father... a) Is that possible? Explain. b) The accused man can prove that both of his parents are type AB. Is it possible for him to be type B? If so, what is his genotype? Explain. d) Does the answer in part c change the answer in part b? Explain.arrow_forward
- 7.7 Genes a and b are 20 cM apart. An a* b*la* b* individual was mated with an a bla b individual. (a) Diagram the cross and show the gametes produced by each parent and the genotype of the F₁. (b) What gametes can the F, produce, and in what proportions? (c) If the F, was crossed to a bla b individuals, what off- spring would be expected, and in what proportions? (d) Is this an example of the coupling or repulsion link- age phase? (e) If the F, were intercrossed, what offspring would be expected, and in what proportions?arrow_forwardIn a cross between a black and a white guinea pig, all members of the F1 generation are black. The F2 generation is made up of approximately 3/4 black and 1/4 white guinea pigs. (a) Diagram this cross, showing the genotypes and phenotypes. (b) What will the offspring be like if two F2 white guinea pigs are mated? (c) Two different matings were made between black members of the F2 generation, with the following results. Cross Offspring Cross 1 All black Cross 2 3/4 black, 1/4 white Diagram each of the crosses.arrow_forwardAccording to Mendelian genetics, the phenotype of a homozygous dominant individual is the same as that of a _______ individual. A)Heterozygous B)Heterozygous recessive C)Hemizygous D)Homozygous recessivearrow_forward
- Consider a species of wasp in which females are diploid and come from fertilized eggs, while males are haploid and come from unfertilized eggs. Assuming that a queen mates with only one male, determine the coefficient of relationship (r) for each of the following. a)A female (worker) to her sister: b)A female (worker) to her brother: c)A female (worker) to her fatherarrow_forwardTwo pairs of genes (TTLL) are postulated to influence the size of corn in certain varieties with equal and additive effects. A tall corn variety averaging 6 feet was crossed with a dwarf corn variety averaging 2 feet. (a) If the size of the dwarf is attributed to the genotype (ttll), what is the effect of each gene that increases the size above 2 feet? (b) Diagram a cross between a large and small variety, and classify the expected F2 phenotypes.arrow_forwardShown below is a pedigree for Phenylketonuria (PKU), an autosomal recessive metabolic disorder. The characteristic feature of PKU is severe mental retardation A) What is the probability that individual II-1 is heterozygous for this gene? B) What is the probability that individual III-4 is heterozygous for this gene? C) If individuals III-3 and III-4 were to marry, what is the probability that their child would express PKU?arrow_forward
- The distance between k and e would be approximately... a) 6.25 cM b) 6.6 cM c) 4.65 cM d) 5.0 cM e) 11.65 cMarrow_forwardIf having green eyes is dominant to purple: (use the letter G for your alleles) A)What is the genotype of a heterozygous green eyed monster? B) What is the genotype of a purple eyed monster C) What is the genotype of a purebred green eyed monster?arrow_forwardTwo normal-looking fruit flies were crossed and, in their progeny, there were 202 females and 98 males. (i) What is unusual about this result? (ii) Provide a genetic explanation for this anomaly. (iii) Provide a test of your hypothesis.arrow_forward
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