6. Chromosomal Variation
Chromosomal Mutations: Aberrant Euploidy
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Practice this topic
- Multiple Choice
Which of the following chromosomal mutations increases the amount of genetic material from all chromosomes?
- Multiple Choice
True or False:Autopolyploids contain multiple chromosomal sets from two closely related species
- Multiple Choice
A species has 2n = 20. How many chromosomes will be found per mutant cell in an autotriploid organism.
- Open QuestionIn this chapter, we have focused on chromosomal mutations resulting from a change in number or arrangement of chromosomes. In our discussions, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions?How do we know that specific mutant phenotypes are due to changes in chromosome number or structure?
- Open Question
Consider synapsis in prophase I of meiosis for two plant species that each carries 36 chromosomes. Species A is diploid and species B is triploid. What characteristics of homologous chromosome synapsis can be used to distinguish these two species?
- Open Question
From the following list, identify the types of chromosome changes you expect to show phenotypic consequences.
polyploidy - Open Question
From the following list, identify the types of chromosome changes you expect to show phenotypic consequences.
trisomy