Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 21, Problem 16TYK
Design an experiment to test the hypothesis that the differences in size among adult guppies are determined by the amount of food they eat rather than by genetic factors.
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The text explains that selective breeding involves breeding animals or plants for specific desirable traits. For example, humans bred different types of dogs to accomplish certain jobs. Farmers breed chickens for having meat and laying a greater amount of eggs. Cattle are often selectively bred either for more meat or for more milk production. The text also notes that breeding animals for size and strength interferes with natural animal processes. Based on this information presented in the text, who benefits from the traits different animals are bred for?
a) humans breeding the animals
b) the animals being bred by the humans
c) both the humans breeding the animals and the animals being bred by the humans
d) animals not being bred by humans
explain how humans are related to each of the following animals by indicating the level of relatedness and which traits are evidence for this level of relatedness
a) lamprey
b) sea star
c) beetle
MAKE A simple sketch and label characteristics
Choose a human-related organism to study. As you consider strategies to enhance the social value of this organism, think of other desirable attributes that may be added to it. Imagination is a powerful tool, so let it go wild and imagine that you can transfer genes across other animals.
For example: A gene from a firefly has been transferred into tobacco plants so that they may glow in the dark, as demonstrated by geneticists. Tobacco pests are less likely to attack at night because of this.
Chapter 21 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 21.1 - If a population of skunks includes some...Ch. 21.1 - Prob. 2SBCh. 21.1 - What factors contribute to phenotypic variation in...Ch. 21.2 - Prob. 1SBCh. 21.2 - Why is the Hardy-Weinberg principle considered a...Ch. 21.2 - Prob. 3SBCh. 21.3 - Which agents of microevolution tend to increase...Ch. 21.3 - Which mode of natural selection increases the...Ch. 21.3 - In what way is sexual selection like directional...Ch. 21.4 - How does the diploid condition protect harmful...
Ch. 21.4 - Prob. 2SBCh. 21.4 - Prob. 3SBCh. 21.5 - How can a biologist test whether a trait is...Ch. 21.5 - Why are most organisms adapted to the environments...Ch. 21 - The reason spontaneous mutations do not have an...Ch. 21 - The phenomenon in which chance events cause...Ch. 21 - Prob. 3TYKCh. 21 - Prob. 4TYKCh. 21 - Prob. 5TYKCh. 21 - Which of the following represents an example of...Ch. 21 - A population of mice is at HardyWeinberg...Ch. 21 - If the genotype frequencies in a population are...Ch. 21 - An Eastern European immigrant carrying the allele...Ch. 21 - If a storm kills many small sparrows in a...Ch. 21 - Prob. 11TYKCh. 21 - Discuss Concepts Many human diseases are caused by...Ch. 21 - Prob. 13TYKCh. 21 - Apply Evolutionary Thinking Captive breeding...Ch. 21 - Prob. 15TYKCh. 21 - Design an experiment to test the hypothesis that...Ch. 21 - Peter and Rosemary Grant of Princeton University...
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- SOLVE STEP BY STEP IN DIGITAL FORMAT In cattle, the character lack of horns is dominant (C) to the presence of horns. Our bull mates with three cows. Cow A, without horns, had a calf with horns; Cow B, with horns, had a polled calf and Cow C, with horns, had a polled calf. What is the genotype of:a). bullb). cow Ac). cow Bd). cow Carrow_forwardSCIENTIFIC INQUIRY Scientists search the scientific literature using electronic databases such as PubMed, a free online database maintained by the National Center for Biotechnology Information. Use PubMed to find the abstract of an article that Hopi Hoekstra published in 2017 or later. Choose the correct articles. Select the two correct answers. Developmental mechanisms of stripe patterns in rodents QnAs with Hopi Hoekstral Executive functioning and emotion recognition in youth with oppositional defiant disorder and/or conduct disorder Coevolution of genome architecture and social behavior The selective glucocorticoid receptor antagonist CORT125281 has tissue-specific activity The genetic basis of parental care evolution in monogamous mice Submit Request Answer 0 0arrow_forwardThat African infants tend to walk earlier than Western infants suggests that walking: a. that race determines the earliest age of walking. b. is a completely adaptive behaviour to the particular environment in which the infant is raised. c. is not completely controlled by genetics. d. follows a proximodistal progression.arrow_forward
- What is the relation of genetics to Alzheimer’s disease? a. Identified genes have a strong effect on early-onset Alzheimer’s disease and a weaker effect on lateonset disease. b. Identified genes have a weak effect on early-onset Alzheimer’s disease and a stronger effect on lateonset disease. c. Identified genes have a strong effect on both the early and late onset forms of Alzheimer’s disease. d. Identified genes have little or no effect on Alzheimer’s disease, regardless of time of onset.arrow_forwardwhich illustrates Buri’s experiment on genetic drift in populations of Drosophila. List evidence that you see for the effects of genetic drift in the results of this experiment.arrow_forwardWhat is migration? Why do animals show this phenomenon?arrow_forward
- The theory that is based on four principles that describe how organisms who are well-adapted to their environment survive to produce offspring is calledarrow_forwardIn a savanna ecosystem, scientists investigate a species of antelope. Male antelopes display elaborate horns, which are used in ritualized combat during the mating season. Females are observed to choose mates with larger and more symmetrical horns. Which hypothesis suggests that the preference for males with larger and more symmetrical horns is based on the direct correlation between horn size and the male's overall physical condition? Group of answer choices Runaway sexual selection Good health hypothesis Good DNA hypothesis Sexy son hypothesisarrow_forwardJean-Baptiste Lamarck (1744-1829), a French scientist who believed in evolution, is known for Lamarckism, or inheritance through acquired characteristics. He argued that environmental influences could put pressure on animals, making them use some characteristics more and some less, and that the changes acquired by the parents would be passed to the next generations. A common example of this theory is that giraffes could actually grow longer necks by straining to get to higher and higher branches for food, and that the offspring of these longer- necked giraffes would have longer necks at birth. We will get to epigenetics later in the class, and realize that Lamarck wasn't all wrong. But he was mistaken about giraffes! Your responses will help you understand why... (France page 7) a. Is this argument at the level of a hypothesis, or is it a theory? Why? b. How would you set up an experiment to test Lamarck's beliefs? c. What would be your dependent variable? d. What would be your…arrow_forward
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