Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 13, Problem 8SQ
Summary Introduction
Concept introduction: The allele is the variant of the gene. The allele can be dominant or recessive. The dominant allele is the one that will be expressed in the heterozygous condition where two different alleles of the same gene are present. Phenotypic ratio refers to the ratio of the number of organisms in the generation that would express several
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A cross occurs between a black homozygous mouse and a white homozygous mouse. They produce gray offspring.
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In Mendels breeding experiment on garden pea, the offspring of F2 generation are obtained in the ratio of 25% pure yellow pod, 50% hybrid green pods and 25% green pods State (i) which pod colour is dominant (ii) The Phenotypes of the individuals of F1generation. (iii) Workout the cross.
Chapter 13 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 13 - A heterozygous individual has a _______ for a...Ch. 13 - An organisms observable traits constitute its...Ch. 13 - Prob. 3SQCh. 13 - The second-generation offspring of a cross between...Ch. 13 - Prob. 5SQCh. 13 - Refer to question 5. Assuming complete dominance,...Ch. 13 - Prob. 7SQCh. 13 - Prob. 8SQCh. 13 - The probability of a crossover occurring between...Ch. 13 - True or false? All traits are inherited in a...
Ch. 13 - Prob. 11SQCh. 13 - The phenotype of individuals heterozygous for...Ch. 13 - Prob. 13SQCh. 13 - Match the terms with the best description. ______...Ch. 13 - Assuming that independent assortment occurs during...Ch. 13 - Refer to problem 2. Determine the predicted...Ch. 13 - Refer to problem 2. Assume a third gene has...Ch. 13 - Prob. 4GPCh. 13 - Suppose you identify a new gene in mice. One of...Ch. 13 - Mendel crossed a true-breeding pea plant with...Ch. 13 - Several alleles affect traits of roses, such as...Ch. 13 - Prob. 1DAACh. 13 - Prob. 2DAACh. 13 - Prob. 3DAACh. 13 - Mutations in the TYR gene may render its enzyme...Ch. 13 - In sweet pea plants, an allele for purple flowers....Ch. 13 - Red-flowering snapdragons are homozygous for...Ch. 13 - A single allele gives rise to the Hbs form of...
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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
- A testcross with a homozygous dominant genotype should lead to progeny that: a. All have a homozygous dominant genotype b. All exhibit a recessive phenotype c. All exhibit a dominant phenotype d. All die, since exclusively homozygous recessive progeny are made e. Have a 3:1 dominant to recessive phenotypearrow_forwardMendel's pea plants were a good choice for studying heredity, because: a) They have lots of easily observable traits that vary in an either-or manner. b) Their mating is uncontrollable. c) There are separate male and female plants. d) The plants are incapable of cross-pollination.arrow_forwardIn guinea pigs, black fur is dominant over white fur. If a homozygous dominant guinea pig were crossed with a homozygous recessive guinea pig, the first generation of offspring would _____. Select all that apply. a be heterozygous b be phenotypically identical c have all black fur d have half black fur and half white fur e be homozygousarrow_forward
- In 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_forwardYou want to cross horses. We will denote the allele for black coat as B and the allele for the brown coat b. You crossed two heterozygous horses and obtain a black horse. What is the probability that this black horse is homozygous dominant (BB)arrow_forwardYou have a pure breeding line of tall corn and a purebreeding line of short corn. When you cross them what do you expect the phenotype of the F1 to be? Group of answer choices A. impossible to tell with the information given B. all medium height C. 3/4 tall and 1/4 short D. all short E. all tallarrow_forward
- A plant that is homozygous for the recessive yellow pod color is crossed with a plant that is heterozygous. Which phenotype will appear MOST in the offspring? A. There will only be plants with green pods. B. There will be more plants with green pods. C. There will be more plants with yellow pods. D. Plants with yellow and green pods will appear in equal numbers.arrow_forwardA woman who is heterozygous, Bb, has brown eyes; B (brown) isthe dominant allele, and b (blue) is recessive. One of her eyes,however, has a patch of blue color. Give three different explanationsfor how this might have occurred?arrow_forwardSome combinations of alleles cause problems to severe the fetus ceases to develop. Such lethal allele combinations appear to alter Mendelian ratios because: A. The allele is masked in heterozygous B. Carriers do not constitute a progeny class C. They do not show a 1:2:1 genotypic ratioarrow_forward
- Two unlinked genese control fur color in gerbils. You cross a true breeding black furred gerbil and a true breeding brown furred gerbil. All of the offsprings are black furred. When you intercross these F1's, the offsprins occur in a ratio of 15 blacks: 1 brown furred. What genotype made up the black furred offspringarrow_forwardA particular flower can be purple, blue, red or white. Two different pure-breeding white plants are crossed and the F1 are then crossed to produce an F2 generation. What might a 9:7 phenotypic ratio in the F2 indicate? A) additivity B) codominance C) recessive lethality D) reciprocal recessive epistasis E) dominant epistasis Explain each answer.arrow_forwardA white-flowered plant is crossed with a red-flowered plant and all of the offspring are pink. This is an example of: A) sex-linked inheritance B) the principle of segregation C) incomplete dominance D) linked genes E) codominancearrow_forward
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