Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 15, Problem 4TYU
A planet is inhabited by creatures that reproduce with the same hereditary patterns seen in humans. Three
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Females from a pure-breeding curly-winged strain are mated with males from a pure-breeding straight-winged (wild-type) strain. The F1 mate with each other to produce an F2 generation that consists of 160 flies with curly wings and 80 with straight wings. What can you infer from this observation?
Explain your answer and why the other options do not qualify,
A) Curly wings is a recessive trait.
B) The dominant curly wing allele is also a recessive lethal.
C) Wing shape is controlled by two codominant alleles.
D) Two interacting genes determine wing shape.
E) All of the hybrid F 1 flies had straight wings.
In Border Collies, black coat (B) is dominant to red coat (b). A breeder has a black male that has won numerous awards.T he breeder would like to use the dog for breeding if he is purebred (BB). To learn this information, she testcrosses him with a red female (bb).
a) If the black male is BB, what kind of gamete (sperm) can he produce?
b) If the red female is bb, what kind of gamete (eggs) can she produce?
c) If the black male is Bb, what kind(s) of gametes (sperm) can he produce?
d) If any of the puppies are red, what is the father's genotype?
Two pea plants that are true-breeding for recessive white flowers are mated and their offspring analyzed. Which of the following statements about this situation is true?
Group of answer choices
A)The offspring represent the P generation.
B)The gametes produced by the offspring will carry only one allele for this gene.
C)Both parents are referred to as heterozygotes.
D)Half of the offspring will be true-breeding for white flowers.
Chapter 15 Solutions
Campbell Biology
Ch. 15.1 - MAKE CONNECTIONS Review the description of...Ch. 15.1 - WHAT IF? Propose a possible reason that the first...Ch. 15.1 - Which one of Mendel's laws describes the...Ch. 15.2 - A white-eyed female Drosophila is mated with a...Ch. 15.2 - Neither Tim nor Rhoda has Duchenne muscular...Ch. 15.2 - MAKE CONNECTIONS Consider what you learned about...Ch. 15.3 - When two genes are located on the same chromosome,...Ch. 15.3 - VISUAL SKILLS For each type of offspring of the...Ch. 15.3 - Prob. 3CCCh. 15.4 - Prob. 1CC
Ch. 15.4 - Prob. 2CCCh. 15.4 - Prob. 3CCCh. 15.5 - Gene dosagethe number of copies of a gene that are...Ch. 15.5 - Reciprocal crosses between two primrose varieties,...Ch. 15.5 - WHAT IF? Mitochondrial genes are critical to the...Ch. 15 - What characteristic of the sex chromosomes allowed...Ch. 15 - Why are males affected by X-Iinked disorders much...Ch. 15 - Why are specific alleles of two distant genes more...Ch. 15 - Prob. 15.4CRCh. 15 - Explain how genomic imprinting and inheritance of...Ch. 15 - A man with hemophilia (a recessive, sex-linked...Ch. 15 - Pseudohypertrophic muscular dystrophy is an...Ch. 15 - Prob. 3TYUCh. 15 - A planet is inhabited by creatures that reproduce...Ch. 15 - Prob. 5TYUCh. 15 - A wild-type fruit fly (heterozygous for gray body...Ch. 15 - Assume that genes, A and B are on the same...Ch. 15 - Two genes of a flower, one Controlling blue (B)...Ch. 15 - Prob. 9TYUCh. 15 - Banana plants, which are triploid, are seedless...Ch. 15 - Prob. 11TYUCh. 15 - SCIENTIFIC INQUIRY DRAW IT Assume you are mapping...Ch. 15 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 15 - SYNTHESIZE YOUR KNOWLEDGE Butter flies have an X-Y...
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- Can you please not type the answer can you write it on a paperarrow_forwardThere are two genetically-determined traits that are seen in a species of salamander. The S-gene codes for spotting: SS or Ss = white spots; ss = no spots. The W-gene codes for skin texture: WW or Ww=wrinkly; ww = smooth. If a cross is done between SSWW and ssww parents, what genotype(s) would you expect to see in the offspring of this dihybrid cross? NOTE: Assume no recombination. O Ss, ss, WW. ww O SW, sw, Sw, sw O SsWw O SSWW, sswwarrow_forwardIn the video game Animal Crossing: New Horizons, flowering breeding is based in genetics. Each flower's color is determined by the genotype at three or four unlinked genes: R, Y, W, and S. The genotype of the elusive blue rose is RR YY ww ss. In the game, one way to get a blue rose is to cross two roses with the Rr Yy Ww ss genotype. A) What types of gametes and in what proportions will a Rr Yy Ww ss rose produce? B) In a cross Rr Yy Ww ss x Rr Yy Ww ss what are the possible offspring genotypes and at what frequency will they each appear? Show your work. C) What proportion of the offspring of the cross will be blue roses?arrow_forward
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- On the planet of Caracas, in the Stellar Solorais KaChunka Galaxy, there is a population of Nuggetarians. A phenotype of interest is Peanutus02. There are two alleles for the autosomal gene associated with Peanutus02. A true-breeding cross between a female with the Peanutus02 (disease) phenotype and a male with the wild-type phenotype produces the following offspring counts: Phenotype Number of Males Number of Females Wild-Type 550 562 Peanutus02 0 0 Of the following choices, the most likely mode of inheritance for the Peanutus02 phenotype is: On the planet of Caracas, in the Stellar Solorais KaChunka Galaxy, there is a population of Nuggetarians. A phenotype of interest is Peanutus02. There are two alleles for the autosomal gene associated with Peanutus02. A true-breeding cross between a female with the Peanutus02 (disease) phenotype and a male with the wild-type phenotype produces the following offspring counts: Phenotype Number of Males Number of Females Wild-Type…arrow_forwardSearch the menus (Alt+/) A, ? 100% Normal text Calibri + в I UА 11 I 1 2 | 3 5 | 6 7 8 9 10 11. In cockroaches, red exoskeletons (bodies) are recessive to black exoskeletons. A red male cockroach is crossed with a heterozygous black female cockroach. Twenty-four "baby" cockroaches are hatched from the egg. How many of these do you expect to be black? How many do you expects to be red? Allele and Phenotype All Genotype and Phenotype Possibilities Parent Genotypes Punnett Square Answer Letter Phenotype Genotype Phenotype Dad Momarrow_forwardIn your experiments with Drosophila, you found that the wildtype allele that codes for grey adult insects is sometimes mutated, with mutants having a black colour. Similarly, you find that your population has alleles that code for vestigial wings instead of the wildtype normal wings. (Both mutations are recessive.) You want to know whether the two genes for body colour and wings are linked. In your preliminary crosses you have established a large number of individuals that you require for testcrosses. 9a. Which two genotypes will you use for the testcross? (Hint: One of the two genotypes should be a heterozygous dihybrid.) Use the common wildtype notation (e.g., “ar+ tg”) rather than the allele notation (VvZZ). For simplification, disregard the gender.arrow_forward
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