Concepts of Genetics (11th Edition)
11th Edition
ISBN: 9780321948915
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 4, Problem 11PDQ
In rabbits, a series of multiple alleles controls coat color in the following way: C is dominant to all other alleles and causes full color. The chinchilla
For each case, determine the genotypes of the P1 generation and the F1 offspring, and predict the results of making each indicated cross between F1 individuals.
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Give the most likely genotypes of the parent in each cross (use B for the burnsi allele and B+ for pipiens allele).
Coat color in labradors is determined by alleles of two unlinked genes, B and E. The coat colors of
dogs with various genotypes are as follows:
BB EE black
Bb Ee black
bb Ee brown (chocolate)
Bb ee yellow
bb ee yellow
Which of the following cannot be inferred from this information?
e and b alleles complement one another
O e is dominant to b
Oe is epistatic to b
B is dominant to b
An allelic series determines coat color in rabbits: C (full color), c (chinchilla, gray color), c` (Himalayan, white with black
extremities), and c (albino, all white). The C allele is dominant over all others, c is dominant over
over c, and c is recessive to all other alleles. This dominance hierarchy can be summarized as C > c
the table are crossed and produce the progeny shown.
h
Cc X c c
Parents
full color × albino
Himalayan x albino
full color x albino
full color × Himalayan
full color X full color
Cross
A
B
C
D
50% full color, 25% Himalayan, 25% albino
75% full color, 25% albino
E
Match the parental genotypes to the letter corresponding to the appropriate cross listed in the table.
A
CC x cc
VIV
B
Cc x Cc
Offspring
50% full color, 50% albino
50% Himalayan, 50% albino
50% full color, 50% chinchilla
Cc x cc
C
Answer Bank
h
с с X сс
ch
Cc xcc
D
h h
с с X сс
and c, c is dominant
> c> c. The rabbits in
E
Chapter 4 Solutions
Concepts of Genetics (11th Edition)
Ch. 4 - In the guinea pig, one locus involved in the...Ch. 4 - In some plants a red flower pigment, cyanidin, is...Ch. 4 - Below are three pedigrees. For each trait,...Ch. 4 - Prob. 1CSCh. 4 - Prob. 2CSCh. 4 - Prob. 3CSCh. 4 - HOW DO WE KNOW? In this chapter, we focused on...Ch. 4 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 4 - In shorthorn cattle, coat color may be red, white,...Ch. 4 - In foxes, two alleles of a single gene, P and p,...
Ch. 4 - In mice, a short-tailed mutant was discovered....Ch. 4 - List all possible genotypes for the A, B, AB, and...Ch. 4 - With regard to the ABO blood types in humans,...Ch. 4 - In a disputed parentage case, the child is blood...Ch. 4 - The A and B antigens in humans may be found in...Ch. 4 - In chickens, a condition referred to as creeper...Ch. 4 - In rabbits, a series of multiple alleles controls...Ch. 4 - Three gene pairs located on separate autosomes...Ch. 4 - As in Problem 12, flower color may be red, white,...Ch. 4 - Horses can be cremello (a light cream color),...Ch. 4 - With reference to the eye color phenotypes...Ch. 4 - Pigment in mouse fur is only produced when the C...Ch. 4 - In rats, the following genotypes of two...Ch. 4 - Given the inheritance pattern of coat color in...Ch. 4 - In a species of the cat family, eye color can be...Ch. 4 - In a plant, a tall variety was crossed with a...Ch. 4 - In a unique species of plants, flowers may be...Ch. 4 - Five human matings (15), identified by both...Ch. 4 - A husband and wife have normal vision, although...Ch. 4 - In humans, the ABO blood type is under the control...Ch. 4 - In Drosophila, an X-linked recessive mutation,...Ch. 4 - Another recessive mutation in Drosophila, ebony...Ch. 4 - In Drosophila, the X-linked recessive mutation...Ch. 4 - While vermilion is X-linked in Drosophila and...Ch. 4 - In a cross in Drosophila involving the X-linked...Ch. 4 - Consider the three pedigrees below, all involving...Ch. 4 - In goats, the development of the beard is due to a...Ch. 4 - Predict the F1 and F2 results of crossing a male...Ch. 4 - Two mothers give birth to sons at the same time at...Ch. 4 - Discuss the topic of phenotypic expression and the...Ch. 4 - Prob. 35PDQCh. 4 - Labrador retrievers may be black, brown...Ch. 4 - A true-breeding purple-leafed plant isolated from...Ch. 4 - In Dexter and Kerry cattle, animals may be polled...Ch. 4 - A geneticist from an alien planet that prohibits...Ch. 4 - The following pedigree is characteristic of an...Ch. 4 - Students taking a genetics exam were expected to...Ch. 4 - In four oclock plants, many flower colors are...Ch. 4 - Proto-oncogenes stimulate cells to progress...Ch. 4 - Below is a partial pedigree of hemophilia in the...
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- In chickens, a dominant hereditary abnormality (e.g., creepers) causes death when the genotype is homozygous (CC). The recessive condition (cc) at this locus produces a normal phenotype. Another gene locus with co dominant alleles is known to govern feather color such that the genotype FF = black, ff = splashed white, and Ff = blue. Also, a completely dominant gene W produces white skin. Yellow skin is produced by the homozygous genotype ww. QUESTIONS: In CcFfWw x ccffWw, what proportion of the offspring is: b.2 normal, white feathered, white skinned b.3 yellow skinnedarrow_forwardIn rabbits, an allelic series helps to determine coat color: C (full color), cch (chinchilla; gray color), ch (Himalayan; white with black extremities), and c (albino; all white). The C allele is dominant to all others, cch is dominant to ch and c, ch is dominant to c, and c is recessive to all the other alleles. This dominance hierarchy can be summarized as C > cch > ch > c. Indicate the phenotypic ratios expected in rabbits with the cross cchch × chc. 1 full color:1 chinchilla 1 full color:1 Himalayan 1 chinchilla:1 Himalayan 3 full color:1 chinchilla 2 full color:1 Himalayan:1 albinoarrow_forwardIn the guinea pig, one locus involved in the control of coat color may be occupied by any of 4 alleles: C (full color), ck (sepia), cd (cream), or ca (albino). The order of dominance is C > ck > cd > ca. A sepia pig was crossed with a cream pig, where the sepia pig had 2 full-color parents & the cream pig had 2 sepia parents. One of the piglets from this cross was albino. What phenotypic ratio is expected from this cross? A) All sepia piglets B) 1/2 full color : 1/4 sepia : 1/4 cream piglets C) 1/2 cream : 1/2 albino piglets D) 1/2 sepia : 1/4 cream : 1/4 albino piglets E) 3/4 sepia & 1/4 cream piglets F) All cream piglets G) 1/2 sepia : 1/2 cream pigletsarrow_forward
- Labrador retrievers have 3 varieties of fur colour: yellow, chocolate or black. Two genes are involved, each with a dominant (Y and B) and a recessive allele (y and b). The allele Y codes for the ability to produce hair pigment: Yy and YY dogs have dark pigmented fur but all yy individuals are lighter coloured and yellow. The B allele codes for the ability to make hair with the darkest colouration: BB and Bb individuals have black fur; bb dogs have a lighter shade which is chocolate. In the blank Punnet Square below, calculate and state the ratio of phenotypes that occur with a cross between two individuals with the genotype YyBb.arrow_forwardBronze coloured turkey is controlled by a dominant allele, B. Red coloured turkey is homozygous for a recessive allele bb. Dominant gene N produce normal feather and recessive genotype produce ‘hairy’ feather nn. In a cross between homozygous bronzed coloured turkey with ‘hairy’ feather and homozygous red coloured turkey with normal feather. What are the ratios of F2 progeny with Bbnn genotypes? (I want to check if what i'm doing is correct)arrow_forwardThe white Leghorn breed of chickens is homozygous for the dominant allele C, which produces colored feathers. However, this breed is also homozygous for the dominant allele I of an independently assorting gene that inhibits coloration of the feathers. Consequently, Leghorn chickens have white feathers. The white Wyandotte breed of chickens has neither the allele for color nor the inhibitor of color; it is therefore genotypically cc ii. What are the F2 phenotypes and proportions expected from intercrossing the progeny of a white Leghorn hen and a white Wyandotte rooster?arrow_forward
- In horses, height is controlled by incomplete dominance. The two alleles are Tall (T) and short (T’). The heterozygous genotype is expressed as medium height. What is the phenotype of a horse with the genotype TT? What is the phenotype of a horse with the genotype T’T’? What is the phenotype of a horse with the genotype TT’? *arrow_forwardIn Shorthorn cattle, coat color is controlled by a single gene thatcan exist as a red allele (R) or a white allele (r). The heterozygotes (Rr) have a color called roan that looks less red than theRR homozygotes. However, when examined carefully, the roanphenotype in cattle is actually due to a mixture of completelyred hairs and completely white hairs. Should this be calledincomplete dominance, codominance, or something else?Explain your reasoningarrow_forwardIncomplete Dominance: 1) On the planet Iota Geminorum IV there exists a small hairy animal known as a tribble. It comes in three colors blue, red, and purple. This trait is controlled by a single locus with incompletre dominance. A homozygous CBCB is blue, a homozygous CRCR is red, and a heterozygous CBCR is purple. a. What would be the genotypes and phenotypes of the offspring if a blue tribble were crossed with a red one? b. If the offspring in #1 were crossed what would the genotypic and phenotypic ratios be of this generation?arrow_forward
- In mice, the presence of a dominant A allele results in the agouti pattern of fur color, whereas the aa homozygous recessive results in a solid color pattern. The presence of another dominant B allele results in black fur color, whereas the homozygous recessive bb results in brown fur color. The presence of a third dominant C allele is required for any color to be observed (brown or black), whereas the homozygous recessive cc results in lack of any color whatsoever (albino). What is the phenotype of a mouse with the following genotype? Aa bb cc albino Agouti color pattern and brown Solid color pattern and brown Agouti color pattern and black Solid color pattern and blackarrow_forwardIn cardinals, a dominant allele R is required for red feathers (r = colorless). In addition, the dominant allele I (of an unlinked gene. is an inhibitor of color (birds with an I allele are colorless; I overrides the effects of R). If a true breeding red cardinal mates with a colorless female (genotype = r/r; I/I): a) What would be the genotype of the F1 progeny? b) What would be the phenotype of the F1 progeny? c) If the F1 progeny are selfed, what is the expected colorless:red ratio among the progeny?arrow_forwardThe presence of second allele (E) affects the coat color of Labrador. In particular, the presence of homozygous recessive ee produces yellow Labrador. Supposed a male Lab, homozygous dominant for both alleles, is crossed with a female Lab, homozygous recessive for both alleles, what would be the phenotypic ratio of the F1 offspring?arrow_forward
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