Miller and Levine Biology
Miller and Levine Biology
1st Edition
Joseph S. Levine, Kenneth R. Miller
ISBN: 9780328925124
Textbook solutions

All Solutions

Page 508: Review

Exercise 1
Result
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Selective breeding involves taking advantage of the organism’s best trait in order to reproduce an offspring with the same trait. In this way, good traits are passed on to the next generation and reduce the possibility of acquiring genetic defects.
Exercise 2
Result
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Genetic engineers and breeders employ the use of inducing mutations to organisms to increase the genetic variation among organisms. The result of this process often leads to organisms with characteristics that are not common in the original population. More importantly, it brings traits that could be beneficial or useful to an individual, such as resistance to diseases.
Exercise 3
Result
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According to the gathered evidence, the DNA of the teosinte and corns are remarkably similar. In this case, scientists claim that these two plants are closely related despite their differences in appearance.
Exercise 4
Step 1
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Interbreeding (hybridization) and inducing mutations are ways to manipulate the genetic makeup of individuals. In hybridization, two dissimilar species are crossed to produce an offspring that contains the genes of both parents. On the other hand, inducing mutations can help an individual to develop unique and useful characteristics that are apart from the others.

In this case, both processes result in an offspring with characteristics that are not common in the original population. Therefore, there is an increase in the genetic variation and biodiversity in our planet.

Result
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Interbreeding (hybridization) and inducing mutations are ways to manipulate the genetic makeup of individuals. In this case, both processes result in an offspring with characteristics that are not common in the original population. Therefore, there is an increase in the genetic variation and biodiversity in our planet.
Exercise 5
Result
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According to the table, sugar cane has undergone the most dramatic change in terms of the chromosome number. This plant has the most number of chromosomes when compared to the other polypoid crops.
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