Campbell Biology: Conc. and Conn. - Access
8th Edition
ISBN: 9780321946850
Author: Reece
Publisher: PEARSON
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Chapter 9, Problem 17TYK
SCIENTIFIC THINKING The breakthrough that led Bateson and Punnett to recognize the existence of linked genes (Module 9.17) was the appearance of unexpected results after they crossed double heterozygous pea plants (PpLI) with each other. Imagine that you have a group of Labrador retrievers that are all heterozygous for both coat color and blindness (BbNn). If you used this group of dogs to produce 160 puppies, how many puppies of each
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Part 1 - With use of Punnett diagrams discuss how the results of experiments carried out by Austrian monk Gregor Mendel on pea plants brought about the Law of Dominance, the Law of Segregation, and the Law of Independent assortment.
Part 2 - In humans, the gene that produces the disease Sickle Cell Anaemia is recessive to the gene for healthy haemoglobin production.
a) How can two phenotypically healthy parents have a child who suffers from Sickle cell Anaemia? In your answer use suitable letters to show the genotypes of the parents and construct a Punnett diagram to show all the possibilities of the children's genotypes.
b) Based on the outcome of your Punnett diagram, state and explain the probability of a child being a sufferer of Sickle Cell Anaemia and the probability of a child not suffering from the disease.
c) If an individual who suffers from Sickle cell disease has a child with someone who is healthy (and not carrying the sickle cell gene), what is the probability that…
SUBJECT: GENETICS
Topic: Binomial Probability
Consider albinism a trait to occur in a human family. If two parents are
heterozygous for such trait, the probability of having a normally pigmented child is 3//4 and having an albino child is ¼. What is the probability that 2 will be normal and 1 will be albino?
Imagine that the blue color of dragonflies is known to be determined by multiple genes. A group of citizen scientists observed 9 clearly different shades of blue among dragonflies. How many genes do you predict are likely involved in the determination of color in dragonflies?
Chapter 9 Solutions
Campbell Biology: Conc. and Conn. - Access
Ch. 9 - Connecting the Concepts 1. Complete this concept...Ch. 9 - Whether an allele is dominant or recessive depends...Ch. 9 - Edward was found to be heterozygous (Ss) for...Ch. 9 - Two fruit flies with eyes of the usual red color...Ch. 9 - A man with type B blood and a woman who has type A...Ch. 9 - Tim and Jan both have freckles (see Module 9.9),...Ch. 9 - Both Tim and Jan (problem 6) have a widows peak...Ch. 9 - In rabbits, black hair depends on a dominant...Ch. 9 - A fruit fly with a gray body and red eyes...Ch. 9 - A series of matings shows that the recombination...
Ch. 9 - A couple are both phenotypically normal, but their...Ch. 9 - Why do more men than women have colorblindness?Ch. 9 - In fruit flies, the genes for wing shape and body...Ch. 9 - Adult height in humans is at least partially...Ch. 9 - Heather was surprised to discover she suffered...Ch. 9 - In 1981, a stray black cat with unusual rounded,...Ch. 9 - SCIENTIFIC THINKING The breakthrough that led...
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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
- EVOLUTION LINK Darwins theory of evolution by natural selection is based on four observations about the natural world. One of them is that each individual has a combination of traits that makes it uniquely different. Darwin recognized that much of this variation among individuals must be inherited, but he did not know about Mendels mechanism of inheritance. Based on what you have learned in this chapter, briefly explain the variation among individuals that Darwin observed.arrow_forwardin a summary use your understanding of molecular biology to explain that recessive alleles are expressed through transcription and translation, and that they may have functional gene products. Describe how the interaction of the products produced by each allele results in what we see as dominant or recessive traits.arrow_forwardA scientist predicts that the kittens born with a congenital birth defect will be 25% based on the hypothesis that it is caused be a recessive gene in that breed of cat. After surveying several litters, he found that 44 out of 128 kittens had the defect. Is his hypothesis correct? Use Chi-Square to solvearrow_forward
- You are conducting a genetic experiment with flies. BB represents flies with black eyes and bb corresponded to flies with red eyes. You crossbreed Bb flies with other Bb flies. What will be the eye color of the offspring?arrow_forwardAccording to the video “The Biology of Skin Color”, why is it that the allele coding for darker skin did not evolve to protect us from skin cancer? A. Because skin cancer isn't harmful B. Darker skin did develop to protect us from skin cancer C. Because skin cancer usually develops after an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genes D. Because skin cancer usually develops before an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genesarrow_forwardCo-dominance: In a flower shop a costumer wants to have a 50:50 ratio of flower with pure white color and a flower with white and red coloration, to get this result what color of flower would you use as parents?arrow_forward
- Vinca (the periwinkle family) have a height determined by polygenes. The shortest Vinca grow to a full height of only 3 inches, whereas the largest Vinca is 21 inches high at maturity. If one crosses a 3-inch Vinca and a 21-inch Vinca, 12-inch Vinca result. If the F1 are allowed to interbreed, then one gets a range of plants from 3 inches to 21 inches high. However, one only obtains about eight plants in 512 that are 3 inches high and only about eight plants in 512 that are 21 inches high. What is the contribution per contributing allele? If two 12-inch (F1) Vincas are crossed, what is the probability of observing a 6-inch Vinca? If a 12-inch F1 plant is crossed to a 21-inch plant, what is the probability of observing a 15-inch plant?arrow_forwardIn Genetic Variation, If people have a similar genetic makeup, why do weu use DNA to understand or determine whether suspects are innocent or guilty of a crime.arrow_forwardBiology 1. if you cross a dihybrid (AaBb) in cis conformation with a homozygous recessive individual (aabb) and receive 0 recombinants, what specific interaction is this indicative of? 2. the prior cross involved a dihybrid in cis conformation. what are the genotypes of the dihybrid parents? Include proper format for linked traitsarrow_forward
- 1. Fruit Flies and Genetics Research: Imagine you are working in a genetics lab with the fruit fly Drosophila melanogaster, a model organism for genetics research. You want to determine whether a trait you have discovered in fruit flies is dominant or recessive.• Explain how you would design an experiment to answer this question.• Predict what types of outcomes are possible. Which would indicate that the trait is dominant? Which would indicate that it is recessive?2. Model Genetic Organisms: Why are fruit flies considered a model genetic organism? Would humans fit this description?arrow_forwardMore Crosses with Pea Plants: The Principle of Independent Assortment Given the following matings, what are the predicted phenotypic ratios of the offspring? a. AABb Aabb b. AaBb aabb c. AaBb AaBbarrow_forwardEvolutionary Thought: answer the question in essay form. Explain the differences between allele, genotype and phenotype.arrow_forward
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