Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Chapter 10.1, Problem 3CC
WHAT IF? A horticulturalist breeds orchids, trying to obtain a plant with a unique combination of desirable traits. After many years, she finally succeeds. To produce more plants like this one, should she crossbreed it with another plant or clone it? Why?
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Genetics I LAB 11
Onion Genetics
Part 1. We will begin by looking at onion color. Let's arbitrarily assign the letter "R" for color and
say red onions are dominant (R) and white onions are recessive (r).
Cross an individual who is heterozygous with an individual who is homozygous recessive.
1.
What is the genotype of the heterozygous individual?
2.
What is the genotype of the homozygous recessive individual?
Complete the Punnett square using the alleles you just listed.
3. What are the resulting genotypes
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4. What are the resulting phenotypes
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Why is it so expensive to produce a hybrid plant seed?
URGENT PLEASE HELP
A researcher crosses mice with brown eyes and long tails, and the F1 progeny were recovered in the following numbers and phenotypic classes:F1: 6 apricot, short : 30 brown, long : 15 brown, short : 9 apricot, longYou know the genes encoding these traits are autosomal, completely dominant and assort independently. You want to use a chi-square test to analyse these results.a) Making use of the appropriate genetic convention for naming alleles, give the genotype of the male parent in this cross. b) What is your null hypothesis for the chi-square test? c) Give the expected number of individuals in the “brown, long” class.
Chapter 10 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 10.1 - MAKE CONNECTIONS Using what you know of gene...Ch. 10.1 - How does an asexually reproducing eukaryotic...Ch. 10.1 - WHAT IF? A horticulturalist breeds orchids, trying...Ch. 10.2 - Prob. 1CCCh. 10.2 - Prob. 2CCCh. 10.2 - Prob. 3CCCh. 10.2 - WHAT IF? A certain eukaryote lives as a...Ch. 10.3 - Prob. 1CCCh. 10.3 - WHAT IF? After the synaptonemal complex...Ch. 10.4 - Prob. 1CC
Ch. 10.4 - Prob. 2CCCh. 10 - A human cell containing 22 autosomes and a Y...Ch. 10 - Homologous chromosomes move toward opposite poles...Ch. 10 - If the DNA content of a diploid cell in the G1...Ch. 10 - Prob. 4TYUCh. 10 - Prob. 5TYUCh. 10 - Prob. 6TYUCh. 10 - Prob. 7TYUCh. 10 - Prob. 8TYUCh. 10 - Prob. 9TYUCh. 10 - Prob. 10TYU
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- P Generation F, Generation F, Generation 1. What trait is being studied in the cross pictured above? 2. There are 2 alleles for the trait. What are they? 3. Which allele is the recessive allele? Explain why. 4. Which allele is the dominant allele? Explain why. 5. Which 2 alleles do the F1 plants have? Explain which allele was inherited from which parent.arrow_forwardYou are a studying the genetic basis of horn color in unicorns. Gene C determines the color of pigment destined for the horn by converting a pink precursor into a purple pigment. C- individuals make purple pigment whereas cc individuals accumulate pink precursor. Gene D ensures the deposition of the pigment into the horn cells, such that D- individuals have a colored horn (purple or pink), whereas dd individuals have a white horn. You breed two purple horned unicorns to each other (CcDd). Assuming Gene C and Gene D are unlinked, what is the probability that the baby unicorn has a purple horn? Please express your answer to 2 decimal places (e.g. 0.69).arrow_forwardImagine you are trying to test whether a population of flowers is undergoing evolution. You suspect there is selection pressure on the color of the flower: bees seem to cluster around the red flowers more often than the blue flowers. In a separate experiment, you discover blue flower color is dominant to red flower color. In a field, you count 600 blue flowers and 200 red flowers. What would you expect the genetic structure of the flowers to be?arrow_forward
- From an agricultural point of view, discuss the advantages and disadvantagesof selective breeding. It is common for plant breeders to take two different, highly inbred strains, which are the product of many generations of selective breeding, and cross them to make hybrids. How does this approach overcome some of the disadvantages of selective breeding?arrow_forward1 point Later on, you made a completely new cross. But you cannot remember the genotype from one of the parents. You are sure that one parent was (Ww). You remember your Bio class back in VCU and decided to check the ratios in the plants produced in this cross. If this cross (Ww X??) produced 140 plants, and 105 have purple flowers and 35 have white flowers. Then what is the genotype of the other parental? W=Purple color w=White color W is dominant ООО ww WW Ww You can assume W is dominant and we have complete Dominance with 100% Penetrance and Expressivity. WW 105 X 35arrow_forwardHow to build a genetic map? What is necessary? How does it relate to the physical distance? i. If I have 3 genes and want to learn their distance in cM, how many types of crosses do I need? Why?arrow_forward
- A researcher studied six independently assorting genes in a plant. Each gene has a dominant and a recessive allele: R black stem, r red stem; D tall plant, d dwarf plant; C full pods, c constricted pods; O round fruit, o oval fruit; H hairless leaves, h hairy leaves; W purple flower, w white flower From the cross (P1) RrDdccOoHhWw x (P2) RrddCcooHhww, determine: Note: RrDdccOoHhWw is one genotype. a. How many kinds of gametes can be formed by P1?b. How many genotypes are possible among the progeny of this cross?c. How many phenotypes are possible among the progeny?d. What is the probability of obtaining the RrDdccOohhww genotype in the progeny?e. What is the probability of obtaining a black, dwarf, constricted, oval, hairy, purple phenotype in the progeny?arrow_forwardI have a biology question, this is a matching question, which is only used once: The phenotype of the heterozygote is a blending of the phenotypes of both homozygotes. One allele masks the expression of the only other allele for the trait. One gene pair will interact so as to control the expression of a second gene pair One example is the ABO blood group system. When 3 or more pairs of genes control the expression of a trait. matched with: multiple alleles incomplete dominance polygenics dominance epistasisarrow_forward38 sday, November 5 DOLL Safari File Edit View History Bookmarks Window Help A canton.open.suny.edu B5 Take Te.. S https:.. DCultu. S Lace. S Drago Wom. Does... S Crop. Credi. QUESTION 1 A pea plant that is heterozygous for the flower color gene makes gametes. What is the probability that a specific gamete contains the recessive allele for flower color? Oa. 75 percent Ob.25 percent Oc. 50 percent Od. 100 percentarrow_forward
- Improving the nutritional value of food has long been one of the goals in agricultural genetics. Crossing different strains of plants and animals followed by generations of artificial selection have yielded some successes, including the development of high-protein maize. The use of gene transfer biotechnology has led to other advances, including the creation of nutritionally enhanced rice to combat vitamin A deficiency and blindness. Researchers are now turning their attention to the nutritional enhancement of animals that are used as food. Scientists are now turning their attention to using gene transfer technology to nutritionally enhance animal foods. Recently, biotechnology was used to produce a sheep with increased amounts of an omega-3 essential fatty acid that plays an important role in the development of the nervous system and, in adults, reduces the risk of coronary artery disease. Once a small number of transgenic animals have been produced, they can be bred by conventional methods to establish a source of nutritionally enhanced meat and milk. The use of biotechnology is presenting consumers with many new choices, which will become more common in the future. Increasingly, we will all have to educate ourselves about the pros and cons of such decisions. How would you explain your decision to eat nutritionally enhanced meat from animals modified by biotechnology?arrow_forwardImproving the nutritional value of food has long been one of the goals in agricultural genetics. Crossing different strains of plants and animals followed by generations of artificial selection have yielded some successes, including the development of high-protein maize. The use of gene transfer biotechnology has led to other advances, including the creation of nutritionally enhanced rice to combat vitamin A deficiency and blindness. Researchers are now turning their attention to the nutritional enhancement of animals that are used as food. Scientists are now turning their attention to using gene transfer technology to nutritionally enhance animal foods. Recently, biotechnology was used to produce a sheep with increased amounts of an omega-3 essential fatty acid that plays an important role in the development of the nervous system and, in adults, reduces the risk of coronary artery disease. Once a small number of transgenic animals have been produced, they can be bred by conventional methods to establish a source of nutritionally enhanced meat and milk. The use of biotechnology is presenting consumers with many new choices, which will become more common in the future. Increasingly, we will all have to educate ourselves about the pros and cons of such decisions. On the other hand, how would you explain your preference for meat from animals without higher levels of beneficial fatty acids?arrow_forwardThe "green revolution": food producers needed to maximize yields in the first half of the 20th century. From the 1950's to 1960’s, there was an extensive effort world-wide to increase crop productivity. Norman Borlaug, the "Father of the Green Revolution", is credited with saving over a billion people from starvation. He received the Nobel Peace Prize in 1970. The approach applied genetic crosses to develop high yield varieties of cereal grains, as well as efforts to improve irrigation infrastructure, management techniques, hybrid seed distribution, synthetic fertilizers, and pesticides. Let's consider additive alleles and their contribution to a trait: Problem: Additive allele 'A' contributes to increased yield of rice. Nonadditive allele 'a' does not. Hence, there are three genotypes and phenotypes possible: -> AA: high yield → Aa: intermediate yield aa: low yield Imagine that rice crop yield is controlled by four additive genes, A, B, C, and D. 1. Farmer Leslie has a true-breeding…arrow_forward
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