Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
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
and their ratios or %?
4. What are the resulting phenotypes
and their ratios or %?
. A geneticist working on a haploid fungus makes a cross between two slow-growing mutants called mossy and spider (referring to the abnormal appearance of the colonies). Tetrads from the cross are of three types (A, B, C), but two of them contain spores that do not germinate.Devise a model to explain these genetic results, and propose a molecular basis for your model.
Chapter 10 Solutions
Campbell Biology in Focus
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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- Oh no! The F1 and F2 generation seed packet labels were mixed around. How would we know which seeds we planted by observing the color of the leaves? (Hint: What are the genotypes of the two generations? What color leaves do they produce in what ratios?)arrow_forwardCan someone help with this question?arrow_forwardplease help?arrow_forward
- You 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_forwardI need explanation for the why the answer is correct? And why would the other options wrongarrow_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
- 1 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_forwardFrom 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_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
- I need help with b, c, d the choices for c) are haploid, diploid or tetraploid the choices for d) are same chromosome, a pair of homologus chromosomes, or two different chromosomesarrow_forwardA 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_forwardquestion is attachedarrow_forward
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