Courses for Kids
Free study material
Offline Centres
Store Icon


share icon
share icon

What is Polyploidy?

Polyploid means a condition where an organism acquires or general diploid cell involved into one or a set of chromosomes. Sometimes it involves more than one set of chromosomes. In Polyploidy it has been found that it is one of the heritable conditions and more than two sets of chromosomes possess into that process. It has been found that Polyploidies are primarily standard in plants. It has also been found that significant angiosperms and speciation are the multiple sources of polyploidy.  

Polyploidy plays a vital role in the process of doubling the chromosomes in hybrid plants. It is essential for allopolyploid. Not only in the plants' polyploidy is also found in certain groups of amphibians and fish. For example, some salamanders, leeches, and frogs belong to this. The Polyploid Organism or cell has three haploid chromosome numbers; sometimes more than three also can be seen. During meiosis, it has been found that it does not need the homologous pairs for gamete's successful formation; hybrid is generally sterile. The plants inherit from each parent and they duplicate the set of chromosomes; meiosis can happen at this stage. As every chromosome has a duplicate set that is derived by homologue. 

In this way, Polyploidies provide fertility on the previously sterile hybrid and achieves a different form of species than the parents. Half of the angiosperm comes through polyploidy. Some of the species are important for humans. Polyploidy in humans is rarely observed. The presence of polyploid cells is seen in differentiated tissues such as the placenta, heart muscles, bone marrow, and liver parenchyma By using this plant's breeding methods, it has been found that polyploidy is used for treating hybrids. It has been observed that polyploidy is rare in animals, and it can be seen primarily on plants. 

Polyploidy in Plants

It has been found that polyploidy exists in the cells; polyploidy found in more than two cells in the chromosome. Polyploidy can be the outcome of random multiplication of one plant through hybridization or genetic material. Polyploidy is hugely found in domesticated crops. Polyploidy is the outcome of chromosome non-disjunction during meiosis or mitosis. Polyploidy mostly can be seen in plants, and it mostly finds in the angiosperms. Polyploidy involves the process of doubling the chromosomes in hybrid plants. At the time of evaluation, polyploidy Polyploidy plays a significant role in the cultivated plants and wild plants. The most stimulating effects of polyploidy are that it is used to plant plants, and it helps plants gain excess plant organs. Polyploid plays a crucial function in the breeding process of plants and crop improvement.

Types of Polyploidy

Polyploidy refers to such a condition where more than two pairs of chromosomes have been found in a creature's cells. It has been found that there are variations of Polyploid that existed in the living being, and according to that, a difference has been found. Tetraploids are one of the variations of polyploids where the chromosomes consist of four sets. Chromosomes consist of six groups known as Hexaploids. Allopolyploidy, Autopolyploidy, and Auto-Allopolyploid are the three types of polyploidy. It has been found that due to polyploidy, different variation chromosomes can be seen.

Aneuploidy and Polyploidy

Aneuploidy refers to a state of the chromosomes where extra chromosomes and missing chromosomes have been found in the cell. It has been found that when women conceive at a higher age, the chances of Aneuploidy are increased. Aneuploidy can be found due to missing chromosomes or unbalanced chromosome sets. It has been found that the absence of more than one set of chromosomes can be the reason for Aneuploid. More than two sets of chromosomes are one of the reasons for polyploidy. Polyploidy can be seen primarily on plants, and Aneuploidy has been primarily found in humans. A fresh set of the chromosome is created by polyploidy, wherein a haploid abnormality of chromosomes is found for the Aneuploidy. 

[Image will be uploaded soon]

Polyploidy Breeding

Polyploidy breeding has been primarily found in the plants, and it has been found that Polyploid Plants have the adapting capability. The particular effect of polyploidy is it affects species-to-species.  On evaluating plants, polyploidy has played a significant part; by the polyploidy breeding, a completely different form of species can be formed that does not bear the identity of both of the parent plants.

Polyploidy in Crop Improvement

Polyploidy plays a vital role in the evaluation and crop development. Many crops have been found that are domesticated by the nature of polyploidy. Wheat is considered the world's most staple food. This is a variation of grass and is cultivated widely for the making of cereal food. One of the greatest examples of polyploidy is wheat, and it grows naturally. Sometimes polyploidy is induced artificially, mainly by the Antimitotic agents, which help plants for breeding.  Polyploidy duplicates the entire set of chromosomes and forms a new variation. One of the critical impacts of polyploidy is it helps increase the size of the cells and happens due to the extra gene copies. Polyploidy is used for changing the colour of the flour, the size, and the shape of the flower. With the help of polyploidy, diversification of crops can be found.

Want to read offline? download full PDF here
Download full PDF
Is this page helpful?

FAQs on Polyploidy

1. What is the Role of Polyploidy?

Answer: It has been found that polyploidy is a common developmental way in various organisms. Polyploidy has been found in mammals, gastropods, insects, and angiosperms. Polyploidy is used as a mechanism, which helps to increase the total size of the organ. When the maximum cells of an organ are based on polyploidy, it helps to increase the size of that particular organ. This effect has been primarily found in insects.

2. Why is Polyploidy Disinfectant?

Answer: It has been found that polyploidy only happens when a particular individual inherits the chromosome sets, which is additional. If an individual inherits the chromosome set that belongs to an odd number, then found that they are mostly infertile. This happens because the correct pairing of chromosomes did not occur during meiosis, and consequently, functional gametes are not produced. 

Competitive Exams after 12th Science