Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 2, Problem 14P
If you roll a die (singular of dice), what is the probability you will roll: (a) a 6? (b) an even number? (c) a number divisible by 3? (d) If you roll a pair of dice, what is the probability that you will roll two 6s? (e) an even number on one and an odd number on the other? (f) matching numbers? (g) two numbers both over 4?
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Why is this answer 3/8. Why do you add 1/8 three times? How would this question be worded for the answer to be 1/8?
(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)…
(C) 1/2 1/2
(D) 1/2
(E) 1/2 x 1/2
25. A couple has 5 children, all sons. If the woman gives birth to a sixth child, what is the
probability that the sixth child will be a son?
(A) 5/6
(В) 1/2
(C) 1/5
(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?
(А) 0%
(B) 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?
(А) TTYҮ х TTҮҮ
(В) Ттуу х ТТYу
(C) TIYY x TIYy
(D) TIYy x TTYY
(E)…
Chapter 2 Solutions
Genetics: From Genes to Genomes
Ch. 2 - For each of the terms in the left column, choose...Ch. 2 - During the millennia in which selective breeding...Ch. 2 - Describe the characteristics of the garden pea...Ch. 2 - An albino corn snake is crossed with a...Ch. 2 - Two short-haired cats mate and produce six...Ch. 2 - Piebald spotting is a condition found in humans in...Ch. 2 - As a Drosophila research geneticist, you keep...Ch. 2 - A mutant cucumber plant has flowers that fail to...Ch. 2 - In a particular population of mice, certain...Ch. 2 - In humans, a dimple in the chin is a dominant...
Ch. 2 - Some inbred strains of the weedy plant Arabidopsis...Ch. 2 - Among Native Americans, two types of earwax...Ch. 2 - Imagine you have just purchased a black stallion...Ch. 2 - If you roll a die singular of dice, what is the...Ch. 2 - In a standard deck of playing cards, four suits...Ch. 2 - How many genetically different eggs could be...Ch. 2 - What is the probability of producing a child that...Ch. 2 - A mouse sperm of genotype a B C D E fertilizes an...Ch. 2 - Your friend is pregnant with triplets. She thinks...Ch. 2 - Galactosemia is a recessive human disease that is...Ch. 2 - Albinism is a condition in which pigmentation is...Ch. 2 - A cross between two pea plants, both of which grew...Ch. 2 - A third-grader decided to breed guinea pigs for...Ch. 2 - The self-fertilization of an pea plant produced...Ch. 2 - The achoo syndrome sneezing in response to bright...Ch. 2 - A pea plant from a pure-breeding strain that is...Ch. 2 - The following table shows the results of different...Ch. 2 - A pea plant heterozygous for plant height, pod...Ch. 2 - In the fruit fly Drosophila melanogaster, the...Ch. 2 - Based on the information you discovered in the...Ch. 2 - Considering the yellow and green pea color...Ch. 2 - What would have been the outcome the genotypic and...Ch. 2 - Recall that Mendel obtained pure-breeding with...Ch. 2 - The gene that likely controlled flower color...Ch. 2 - For each of the following human pedigrees,...Ch. 2 - Consider the pedigree that follows for cutis laxa,...Ch. 2 - A young couple went to see a genetic counselor...Ch. 2 - Huntington disease is a rare fatal, degenerative...Ch. 2 - Is the disease shown in the following pedigree...Ch. 2 - Figure 2.22 shows the inheritance of Huntington...Ch. 2 - Consider the cystic fibrosis pedigree in Figure...Ch. 2 - Prob. 42PCh. 2 - People with nail-patella syndrome have poorly...Ch. 2 - Midphalangeal hair hair on top of the middle...Ch. 2 - A man with Huntington disease he is heterozygous...Ch. 2 - Explain why disease alleles for cystic fibrosis CF...Ch. 2 - The following pedigree shows the inheritance of...
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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 crossarrow_forwardA jar contains 4 red marbles numbered 1 to 4 and 10 blue marbles numbered 1 to 10. A marble is drawn at random from the jar. Find the probability of the given event. Write your answers as reduced fractions.(a) The marble is redYour answer is : (b) The marble is odd-numberedYour answer is : (c) The marble is red or odd-numberedYour answer is : (d) The marble is blue and even-numberedYour answer is :arrow_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_forward
- 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…arrow_forwardLucas conducted a dihybrid cross in his genetics experiment. He observed 315 flies with gray body and long wings, 108 flies with gray body and miniature wings, 101 flies with ebony body and long wings, and 32 flies with ebony body and miniature wings. Analyse these data using test to see if (i) they fit a 9:3:3:1 ratio. (ii) the gray : ebony data fit a 3:1 ratio. Table 1: Chi-square table Chi Square Values and Probability Degrees of Freedom P = 0.99 0.95 0.80 0.50 0.20 0.05 0.01 0.000157 0.00393 0.0642 0.455 1.642 3.841 6.635 2 0.020 0.103 0.446 1.386 3.219 5.991 9.210 0.115 0.352 1.005 2.366 4.642 7.815 11.345 4. 0.297 0.711 1.649 3.357 5.989 9.488 13.277arrow_forward3. 4 genes contribute to cobra length. The base (minimum) length is 6 feet for aabbccdd and the maximum length is 14 feet for AABBCCDD. Note: no Pascal's triangle is needed for this problem. a) Assuming all genes act equally to each other, how much does each capital letter allele add to the length? b) If you cross an AaBbCcdD cobra X an AaBBCcdd cobra, what are the minimum and maximum lengths of the offspring (once they grow up)? Show the genotypes for the min and max.arrow_forward
- Possible equations to use: PID,] = 1- (PBa + 3/4 Pab + 1/2Pbb)" !3! log (1-PID,) log (Pa8 + 3/4 P8b+ 1/2Pbb) n = 8. A breeder is concerned that his best purebred Angus bull may be a carrier for Curly Calf Syndrome. He decides to conduct some test matings by taking this bull and mating him to 15 of the bulls own daughters to determine if he is a possible carrier of this and any other undesirable recessive genes. Show your work. a. How sure would we be that he is not a carrier if all the calves are born normal? b. How many would you need to be 99% sure he was not a carrier?arrow_forwardtype P = n! (p)* (q)"* х! (n - х)! Practice Problem: You cross a true-breeding pea plant with red flowers to a true-breeding pea plant with white flowers. All of your offspring have red flowers. Which gene is dominant? Why? What is the genotype of your offspring? You then cross the offspring to each other. What ratio do you expect? Why? You count 1000 plants and look at their flowers. Your results are as follows: 740 red 260 white Does this follow a simple Mendelian inheritance pattern? Why or why not? DADT 2 MEA SUDI ND D LUT IONSarrow_forwardIf a Punnett square is used to visualize a three-factor cross (trihybrid cross, e.g. YyTtRr x YyTtRr) how many boxes would be inside of the square? O 3 8 O 48 O 64 128 O 256arrow_forward
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