Question

Cite the ways that polyploidy can occur.

   Cite the ways that polyploidy can occur.

Plant Systematics

Plant Systematics

Michael G. Simpson 2nd Edition

Chapter 13, Problem 19

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Polyploidy can occur through a process called autopolyploidy, where an organism has multiple sets of chromosomes from the same species. This can happen due to errors during cell division, such as non-disjunction, where chromosomes fail to separate properly, Show more…

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Key Concepts

Unreduced Gamete Formation

Unreduced gametes are gametes that have not undergone the normal reduction of chromosome number during meiosis. Their fusion during fertilization can lead to polyploid offspring, serving as a key mechanism by which both autopolyploidy and allopolyploidy can occur in nature.

Allopolyploidy

Allopolyploidy occurs through the hybridization between two different species, followed by chromosome doubling, which stabilizes the hybrid by providing it with paired sets of chromosomes. This mechanism not only creates new species but also contributes to genetic diversity and evolutionary innovation.

Polyploidy

Polyploidy is a condition in which an organism contains more than two complete sets of chromosomes. It has significant implications in evolution, speciation, and plant and animal development, often resulting from errors in cell division or hybridization events.

Autopolyploidy

Autopolyploidy arises when a single species experiences chromosome duplication, typically due to errors in meiosis or mitosis that produce unreduced gametes or through somatic doubling of cells. This process leads to multiple sets of homologous chromosomes and can impact the organism’s fertility and adaptability.

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