Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 12, Problem 8RQ
Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/ recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have?
- 600
- 165
- 217
- 468
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Mendel crossed peas having round seeds and yellow cotyledons (seed leaves) with peas having wrinkled seeds and green cotyledons. All the F1 plants had round seeds with yellow cotyledons. Diagram this cross through the F2 generation, using both the Punnett square and forked-line, or branch diagram, methods.
Mendel examined two distinct flower phenotypes in his pea plants.
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other parent homozygous recessive for both traits. Show your work.
Flower
color
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position
violet/white
axial/terminal
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The F1 population produced flowers in a 3:1 ration of dominant to recessive traits.
The F2 population produced flowers in a 3:1 ration of dominant to recessive traits.
Mendel cross-bred F1 plants with F2 plants.
Mendel labeled the offspring of the first plants bred F1, for the first filial generation
Mendel crossed two identical, true-breeding plants for a particular characteristic.
Mendel cross-bred F1 plants with each other.
Mendel crossed two contrasting true-breeding plants with two different traits for a given characteristic.
Mendel labeled the offspring of the first plants bred F1, for the first flower generation.
Chapter 12 Solutions
Biology 2e
Ch. 12 - Figure 12.5 In pea plants, round peas (R) are...Ch. 12 - Figure 12.6 What are the genotypes of the...Ch. 12 - Figure 12.12 What ratio of offspring would result...Ch. 12 - Figure 12.16 In pea plants, purple flowers (P) are...Ch. 12 - Mendel performed hybridizations by transferring...Ch. 12 - Which is one of the seven characteristics that...Ch. 12 - Imagine you are performing a cross involving seed...Ch. 12 - Consider a cross to investigate the pea pod...Ch. 12 - A scientist pollinates a true-breeding pea plant...Ch. 12 - The observable traits expressed by an organism are...
Ch. 12 - A recessive trait will be observed in individuals...Ch. 12 - If black and white true-breeding mice are mated...Ch. 12 - The ABO blood groups in humans are expressed as...Ch. 12 - In a mating between two individuals that are...Ch. 12 - If the allele encoding polydactyly (six fingers)...Ch. 12 - A farmer raises black and white chickens. To his...Ch. 12 - Assuming no gene linkage, in a dihybrid cross of...Ch. 12 - The forked line and probability methods make use...Ch. 12 - How many different offspring genotypes are...Ch. 12 - Labrador retriever's fur color is controlled by...Ch. 12 - Which of the following situations does not follow...Ch. 12 - Describe one of the reasons why the garden pea was...Ch. 12 - How would you perform a reciprocal cross for the...Ch. 12 - Mendel performs a cross using a true-breeding pea...Ch. 12 - Calculate the probability of selecting a heart or...Ch. 12 - The gene for flower position in pea plants exists...Ch. 12 - Use a Punnett square to predict the offspring in a...Ch. 12 - Can a human male be a carrier of red-green color...Ch. 12 - Why is it more efficient to perform a test cross...Ch. 12 - Use the probability method to calculate the...Ch. 12 - Explain epistatis in terms of its Greek-language...Ch. 12 - In Section 12.3, ''Laws of Inheritance," an...Ch. 12 - People with trisomy 21 develop Down’s syndrome....Ch. 12 - A heterozygous pea plant produces violet flowers...
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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_forwardUse a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?arrow_forwardConsidering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring. Parental Plants Offspring tall, violet x tall, white 3/8 tall, white 3/8 tall, violet 1/8 dwarf, violet 1/8 dwarf, white Select the one best answer. DDWW x DDww DdWw x Ddww DDWW x Ddww DDWw x DdWw DdWw x ddWwarrow_forward
- Considering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring. Parental Plants Offspring tall, violet x tall, violet 9/16 tall, violet 3/16 tall, white 3/16 dwarf, violet 1/16 dwarf, white Select the one best answer. DDWW x DdWw DdWw x DdWw DdWw x ddww DdWW x DdWW DDWw x DdWwarrow_forwardImagine that Mendel is tending a garden of 100 pea plants. He has 20 plants that are homozygous for the purple allele, 50 plants that are heterozygous, and 30 plants that are homozygous for the white allele. What is the frequency of the purple (P) allele?What is the frequency of the white (p) allele?arrow_forwardMendel found that three traits in peas—height, flower color, and pod shape—are determined by different genes, and that these genes assort independently. Suppose that true-bred tall plants with violet flowers and inflated pods are crossed to true-bred dwarf plants with white flower and constricted pods. All the plants in the F1 generation are tall, with violet flowers and inflated pods. If these F1 plants are self-fertilized, what fraction of their offspring are expected to … a.)show all three dominant phenotypes? b.)be tall with white flowers and constricted pods?arrow_forward
- What are the seven characteristics that Mendel observed in the pea plants and why were these choices fortuitous?arrow_forwardIn a genetic cross between a homozygous tall plant with homozygous purple flowers and a homozygous short plant with heterozygous purple flowers, how many short plants will you expect in the F2 generation if you sample 36 individuals? Both tall and purple are dominant.arrow_forwardMendel also studied tall and short varieties of pea plants. When he crossed tall x short plants together, the F1were tall. The tall F1 plants were self-hybridized to produce the F2. What proportion of phenotypes would be expected in the F2? 1:2:1 tall:intermediate:short 3:1 tall:short 1:1 tall:short 3:1 short:tall 1:2:1 intermediate:tall:shortarrow_forward
- When Mendel set up a Parental (P) cross between true breeding purple and white flowered plants to generate the F1 and then allowed the F1 to self-pollinate to generate the F2 he saw a dominant to recessive ratio of 3:1. What phenotypic ratio would be expected if he crossed the F1 with the original purple parent? a) 3:1 b) 9:3:3:1 c) 1:1 d) 4:0arrow_forwardGregor Mendel followed specific steps when breeding pea plants to determine the underlying cause and mathematical ratio of specific traits. Drag and drop the four tiles that describe the order of his process and findings. 1 Mendel crossed two identical, true-breeding plants for a particular characteristic. :: Mendel crossed two contrasting true-breeding plants with two different traits for a given characteristic. ::: Mendel labeled the offspring of the first plants bred F1, for first flower generation. Mendel labeled the offspring of the first plants bred F1, for first filial generation. ::: Mendel cross-bred F1 plants with F2 plants. ::: Mendel cross-bred F1 plants with each other. The F2 population produced flowers in a 3:1 ratio of dominant to recessive traits. The F1 population produced flowers in a 3:1 ratio of dominant to recessive traits. DELL & 6 7 1 8 9. 2 earrow_forwardAs you know Mendel’s main contribution to genetics was his proposing a model of particulate inheritance. This discovery contradicted the widely held belief that blending inheritance was the true theory that explained hereditary traits. One advantage that Mendel had in choosing garden peas (Pisum sativum) was that he could either allow the pea flowers on a plant to self-pollinate or he could deliberately cross-pollinate the flowers. For his single locus crosses of pure-breeding lines, he would take the F2 offspring of the dominant phenotype (such as yellow seeds) and ensure that each yellow-seeded plant would self-pollinate. He was able to show that 1/3 of all the yellow-seeded plants in this generation bred true while the other 2/3 of the yellow seeded plants showed segregation. Do you believe that this extra experiment gave additional important evidence for the particulate theory of inheritance or did the offspring from the F1 x F1 cross provide enough evidence of Mendel’s First Law?…arrow_forward
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