WHAT IS LIFE?:GDE.TO BIO....W/PHYS.(LL)
5th Edition
ISBN: 9781319360696
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 9, Problem 4MC
Summary Introduction
Introduction:
If a dominant allele is present in an allele pair, it will completely overshadow the recessive allele.
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A. In corn, yellow kernels (Y) are dominant to white kernels (y). If you cross two plants with the Yy genotype, what percentage of the offspring will have yellow kernels?
B.What percentage of the offspring will have the same genotype as the parent plants?
C.Say you're also interested in corn plant height where tall plants (T) are dominant to short plants (t). You want to save some time and just cross your plants once. The P1 genotypes are YyTT and YYTt. Will you get any short plants with yellow kernels from this cross? Why or why not?
D. If these traits, kernel color and height were linked, how would this affect your experimental outcomes? Would you expect the laws of Mendelian genetics to still apply? Why or why not ?
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?
A 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.
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WHAT IS LIFE?:GDE.TO BIO....W/PHYS.(LL)
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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
- In the edible pea, tall (T) is dominant to short (t), and greenpods (G) are dominant to yellow pods (g). List the typesof gametes and offspring that would be produced in thefollowing crosses:a. TtGg * TtGgb. TtGg * TTGGc. TtGg * Ttggarrow_forwardIn a simple Mendelian monohybrid cross, true-breeding tall plants are crossed with short plants, and the F1 plants, which are all tall, are allowed to self-pollinate. What fraction of the F2 generation will be both tall and heterozygous? Select one: a. 1/8 b. 1/4 c. 1/2 d. 3/4 e. 0arrow_forwardIn a plant, green is dominant over white leaf; long is dominant over round shape. a. How many total genotypes are possible in the offsprings of a dihybrid cross? Show the Punnet square. b. Give the phenotypic and genotypic ratios. c. What is the probability of obtaining a plant with white, round shaped leaves?arrow_forward
- The normal color of snapdragons is red. Some pure linesshowing variations of flower color have been found.When these pure lines were crossed, they gave the following results (see the table):a. Explain the inheritance of these colors.b. Write the genotypes of the parents, the F1, and theF2.arrow_forwardGive typed explanation : In peas, tall (T) is dominant to short (t). A homozygous tall plant is crossed with a short plant. The F1 are self-fertilized to produce the F2. Both tall and short plants appear in the F2. If the tall F2 are self-fertilized, what types of offspring and proportions will be produced?arrow_forwardIn pea plants, spherical seeds (S) are dominant to dented seeds (s). In a genetic cross of twoplants that are heterozygous for the seed shape trait,i. Explain the diagram ii. What fraction of the offspring should have spherical seeds? iii. Use punnett square to show your answer. iv. Interpret the results of a Punnett squarearrow_forward
- True breeding eggplant plants producing deep, purple colored fruit are crossed with true breeding plants producing white fruit. The offspring of this cross all produce lighter, violet fruit. The colors of the fruit are produced by the interactions of the two different alleles. A.Predict the genotype of the F1 plant. B. Predict the expected proportions and genotypes in the F2 generation, if F1 eggplants are crossed.arrow_forwardIn 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_forwardIn venetian violets, three phenotypes occur with respect to flower color: a deep violet (almost back), a white, and a pale lavender. Two pale lavender flowered plants have been crossed. The F1 from this cross has individuals with deep violet flowers, with pale lavender flowers, and individuals with white flowers. A. what are the parent genotypes? B. what would the expected phenotypic ratio be in these F1 plants?arrow_forward
- Green color in corn plant is controlled by a pair of genes. Give the genotype and phenotype of the offspring from the following crosses:a. GG x Ggb. Gg x Ggc. Explain why no observes a colorless corn plantarrow_forwardThe weight of a fruit in a certain variety of squash is varies. When a plant that produces 6-lb fruits is crossed with a plant that produces 2-lb fruits, all offspring produce fruits that weigh 4 lbs each. In the F2 offspring, the variation in weight varies by 0.5 lbs from each. a. How many genes are involved? b. What ratio of squash in the F2 would weigh over 4.5 lbs? 4 I 6 I 4 5 [10I 10I 5 ] 6 [15 20 I 15]I 6 ] 1 7 21 35 35 21 7I1 18 28 56] 70 56 28] 8 ] 1 1 I9 [ 36 I 84 I126|126] 84 I 36 I 9 I 1 1 [ 10 45 120 210 252 210 120] 45 10I 1 1 [11 55 165 330 462 462 330 165 55 11 1arrow_forwardThe genes for tall vine D and yellow seed G, are dominant over their respective alleles for dwarf d and green g. What phenotypes are expected from each of the following crosses? Include phenotypic and genotypic ratio. Use Punnet square to show the ff. Crosses. a. Heterozygous tall, homozygous yellow X Homozygous Tall, heterozygous yellow. b. Homozygous Dwarf, heterozygous yellow X Heterozygous tall, homozygous greenarrow_forward
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