Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 14, Problem 2IQ
A tall pea plant is crossed with a recessive dwarf pea plant. What will the
- a. the tall plant was TT?
- b. the tall plant was Tt?
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shows the results of a cross between a tall pea plant and a short pea plant. a. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the short parent? b. What phenotypes and proportions will be produced if a tall F1 plant is backcrossed to the tall parent?
Petunia flower color is governed by two alleles, but neither allele is truly dominant over the other. Petunias with the genotype RR are red-flowered, those that are heterozygous (RW) are pink, while those with the (WW) genotype have white flowers. This is an example of incomplete dominance.
a. If a white-flowered plant is crossed with a red-flowered plant, what is the genotypic ratio of the F1.
b. What is the phenotypic ratio of the F1.
c. If two of the F1 offspring were crossed, what phenotypes would appear in the F2?.
d. What would be the genotypic ratio in the F2 generation?
Leaf color and stem length in a certain species of diploid flowers are controlled
separately by the R and S locus. The R allele (dominant) results in red leaves while r
results in yellow leaves. S (dominant) results in short stems and s results in long stems.
A cross is performed between a true breeding long-stemmed red plant and a true
breeding short- stemmed yellow plant.
a. What is the genotype and phenotype of the resulting F1 plants?
b. The resulting F1 plants are crossed with long-stemmed plants with yellow leaves.
100 offspring are collected from this cross, and the following phenotype counts
are observed.
phenotype
long red
short red
count
43
8
long yellow
short yellow
40
What are the corresponding genotypes for each of the four classes of the offspring from
this cross?
c. Using the information above, determine the genotype of the gametes contributed by
"parent A" to each of the resulting offspring. Label the gamete types as parental or
nonparental.
Chapter 14 Solutions
Study Guide for Campbell Biology
Ch. 14 - Fill in the following diagram of a cross of...Ch. 14 - A tall pea plant is crossed with a recessive dwarf...Ch. 14 - A true-breeding tall, purple-flowered pea plant...Ch. 14 - a. In the following cross, what is the probability...Ch. 14 - Prob. 5IQCh. 14 - Consider an example in which the M/m gene (for...Ch. 14 - The height of spike weed is a result of polygenic...Ch. 14 - Consider the following pedigree for the trait...Ch. 14 - a. What is the probability that a mating between...Ch. 14 - If two prospective parents both have siblings who...
Ch. 14 - Prob. 1SYKCh. 14 - How many different types of gametes can be formed...Ch. 14 - Prob. 3SYKCh. 14 - _______ gene Description a. has no effect on...Ch. 14 - _________ allele Description a. has no effect on...Ch. 14 - Prob. 3TYKMCh. 14 - Prob. 4TYKMCh. 14 - __________ dominant allele Description a. has no...Ch. 14 - __________ recessive allele Description a. has no...Ch. 14 - __________ genotype Description a. has no effect...Ch. 14 - Prob. 8TYKMCh. 14 - Prob. 9TYKMCh. 14 - Prob. 10TYKMCh. 14 - Prob. 11TYKMCh. 14 - Prob. 12TYKMCh. 14 - According to Mendels law of segregation, a. there...Ch. 14 - The F2 generation a. has a phenotypic ratio of...Ch. 14 - A 1:1 phenotypic ratio in a testcross indicates...Ch. 14 - Which phase of meiosis is most directly related to...Ch. 14 - After obtaining two heads from two tosses of a...Ch. 14 - The probability of tossing three coins...Ch. 14 - The probability of tossing three coins...Ch. 14 - In the F2 of a dihybrid cross involving two...Ch. 14 - In guinea pigs, the brown coat color allele (B) is...Ch. 14 - A true-breeding dwarf corn plant with red ears is...Ch. 14 - Prob. 11TYKCh. 14 - Prob. 12TYKCh. 14 - Prob. 13TYKCh. 14 - In humans, earwax can be wet or dry. The form of...Ch. 14 - You have blood type B, your mother has blood type...Ch. 14 - Prob. 16TYKCh. 14 - Summer squash are either white or yellow. To get...Ch. 14 - Prob. 2GPCh. 14 - True-breeding tall red-flowered plants are crossed...Ch. 14 - Prob. 4GPCh. 14 - Prob. 5GPCh. 14 - Prob. 6GPCh. 14 - Prob. 7GPCh. 14 - Prob. 8GPCh. 14 - Prob. 9GPCh. 14 - Fur color in rabbits is determined by a single...Ch. 14 - Prob. 11GPCh. 14 - The ability to taste phenylthiocarbamide (PTC) is...Ch. 14 - Prob. 13GPCh. 14 - Prob. 14GPCh. 14 - Prob. 15GPCh. 14 - Prob. 16GPCh. 14 - Imagine that a newly discovered, recessively...Ch. 14 - In mice, black fur (B) is dominant to white (b)....
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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
- Imagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the following experimental results in terms of numbers of plants are closest to what you expect in the F2 progeny? a. 8lOroundseeds b. 8lOwrinkledseeds c. 405:395 round seeds:wrinkled seeds d. 610:190 round seeds:wrinkled seedsarrow_forwardCross the two individual heterozygous for two traits found in two different chromososmes. These two individuals have the following genes: G=yellow pea; g=green pea; W smooth pea; w wrinkled pea. GgWwxGgWw A.give the phenotypes of their offsprings with their specific probabilities and phenotypic ratio B.write the genotypes of their offsprings with their probabilities and give the genotypic ratio Hint GgxGg=1/4 GG+1/2Gg+1/4=3/4+1/4g WwxWw=1/4WW+1/2Ww+1/4ww=3/4W+1/4warrow_forwardA tall pea plant with terminal flowers (flowers on the ends of the stems) is crossed with a short plant thathas axial flowers. All 72 offspring are tall with axial flowers. This is a dihybrid cross with the height andflower position traits showing independent assortment. a. Name the dominant and recessive alleles. b. Give the genotypes of the parents and offspring in this cross. c. Predict the F2 offspring when the tall-axial F1's are allowed to self pollinate.arrow_forward
- In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant? O a. Homozygous dominant: RR O b. Homozygous recessive: rr Oc. Incomplete dominance d. Heterozygous dominant: Rr CLEAR MY CHOICEarrow_forwardA dihybrid cross between a homozygous dominant for two traits (YYGG) is crossed with a homozygous recessive for two traits (yygg). A. What percentage of the offspring would be YyGg in the F1 generation? B. What is the expected phenotypic ratio of the F2 generation?arrow_forwardIn certain cactus, prickly spines can be two-pronged or one-pronged. If a homozygous one-pronged cactus is crossed with a homozygous two-pronged cactus, the F1 generation has a mixture of spines (some are two-pronged, some are one-pronged). a. What are the genotypes of the parents and F1s?b. What mode of inheritance is exhibited? c. If the F1s were crossed, what proportion of the F2s will have genotypes like their parents?arrow_forward
- In pea plants, round pea shape is dominant to wrinkled pea shape. If two pea plants that are true breeding for wrinkled peas are crossed, what shape of pea will the first generation of offspring have? O a. one quarter of the peas will be round and three quarters will be wrinkled O b. three quarters of the peas will be round and one quarter will be wrinkled O c. half of the flowers will be round and one quarter will be wrinkled O d. all of the peas will be wrinkled O e. all resulting peas will be roundarrow_forwardUse the image to observe the results of a cross between a tall pea plant and a short pea plant. What phenotypes and proportions will be produced for the two crosses? P generation Tall Tt Gametes Tt F₁ generation T Fertilization Tt t Tall tt Short Tt Tall tt tt Short Conclusion (a) Short (b) Genotypic ratio 1Tt:1tt Phenotypic ratio 1 tall: 1 short Tall F₁ progeny backcrossed to the short parent Answer Bank one-fourth tall and three-fourths short one-half tall and one-half short three-fourths tall and one-fourth short Tall F₁ progeny backcrossed to the tall parent all tall all shorarrow_forwardIn peas, tall is dominant over dwarf. If a plant homozygous for tall is crossed with one homozygous for dwarf : a. What will be the genotype(s) (use the initial of your last name) and phenotype (s) of the F1 plants? b. If the F1 is grown the next season, predict the possible genotypes and phenotypes. c. If you cross the F1 to the tall parent, what phenotype will result of the cross? What will be the ratio of the genotype? d. If you cross the F1 to the short parent, what phenotype will result of the cross? What will be the ratio of the genotype?arrow_forward
- Is this pedigree consistent with extranuclear inheritance of the shaded characteristic? Select one: a. Yes O b. Noarrow_forwardA test cross between a plant of genotype PpSs and the tester white plant with wrinkled seed coat (ppss) gives the following numbers of progeny in four phenotypic types. 14:87:83:16 (purple flower + smooth seed coat: purple flower + wrinkled seed coat: white flower + smooth seed coat: white flower + wrinkled seed coat). a. What is the expected ratio of progeny phenotypes assuming independent assortment of alleles? b. Explain how ratios of progeny show that the two genes are linked. c. How many map units separate the purple and smooth genes? Show your calculations. d. What is the “parental” genotype of the heterozygous parent? (i.e. Which alleles of the P and S loci are present on each of the two chromosomes of the doubly heterozygous parent of this test cross?)arrow_forwardSometimes, two alleles are neither dominant nor recessive, therefore, both alleles are expressed separately in a heterozygous individual. This is called codominance. Which of the following is an example of codominance? a In guinea pigs, black hair is dominant over white hair. A homozygous black guinea pig is crossed with a homozygous white guinea pig. The first generation of offspring are black. b If you cross a plant with blue flowers with a plant with yellow flowers, the offspring will have blue flowers with yellow spots. c If you cross a rhododendron plant with red flowers with a rhododendron plant with white flowers, the offspring will have pink flowers. d A white female cat mates with a brown male cat. The resulting offspring are orange.arrow_forward
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