Polyploidy Origin and Types
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Polyploidy Origin and Types

Learn about the origin of polyploidy, including autopolyploidy and allopolyploidy. Understand how polyploidy can arise from the addition of chromosomes or hybridization between different species.

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@BeautifulLeprechaun

Questions and Answers

What is the result of hybridizing two closely related species?

Allopolyploidy

What is the main reason why a hybrid plant may be sterile?

The chromosomes are not homologous and cannot synapse properly during meiosis

What is an allotetraploid?

A polyploid containing the equivalent of four haploid genomes derived from separate species

What is the difference between an allotetraploid and an amphidiploid?

<p>An amphidiploid is a type of allotetraploid where the original species are known</p> Signup and view all the answers

Which of the following is an example of an amphidiploid plant?

<p>Gossypium (cotton)</p> Signup and view all the answers

What is the key feature of the chromosomes in an allotetraploid plant?

<p>The chromosomes are not homologous and cannot synapse properly during meiosis</p> Signup and view all the answers

What is the term used to describe a condition where an individual has more than two haploid sets of chromosomes?

<p>Polyploidy</p> Signup and view all the answers

Which of the following syndromes is characterized by the presence of three copies of chromosome 13?

<p>Patau syndrome</p> Signup and view all the answers

What is the term used to describe a condition where an individual is missing one or more chromosomes?

<p>Deletion</p> Signup and view all the answers

Which of the following statements is true about autosomal monosomies?

<p>They are rarely found, suggesting monosomic gametes may be functionally impaired.</p> Signup and view all the answers

What is the term used to describe a condition where an individual has three copies of a particular chromosome?

<p>Trisomy</p> Signup and view all the answers

Which of the following statements is true about polyploidy in plants?

<p>It is prevalent in plants.</p> Signup and view all the answers

What is autopolyploidy?

<p>The addition of one or more sets of chromosomes from the same species</p> Signup and view all the answers

How can autotetraploidy arise?

<p>All of the above</p> Signup and view all the answers

What is the role of colchicine in inducing autotetraploidy?

<p>It inhibits mitosis by preventing tubulin polymerization</p> Signup and view all the answers

What is allopolyploidy?

<p>The combination of chromosome sets from different species</p> Signup and view all the answers

Which of the following is NOT a characteristic of autopolyploidy?

<p>It involves chromosome sets from different species</p> Signup and view all the answers

What is aneuploidy?

<p>An abnormal number of chromosomes that is not a multiple of the haploid set</p> Signup and view all the answers

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