The cells having more than two complete sets of chromosomes are called.

Correct option is C

•  Polyploid cells contain more than two complete sets of chromosomes. This condition occurs when an organism inherits extra sets of chromosomes, often due to errors in cell division. Polyploidy is common in plants and can result in larger cell sizes and enhanced survival in certain environmental conditions. Humans typically do not have polyploid cells, but many species of plants and some animals do.

• Polyploidy can occur naturally, or it can be induced artificially, especially in plant breeding to produce better crop varieties.
• Autopolyploidy occurs when the extra chromosome sets are from the same species, while allopolyploidy results from the merging of chromosomes from different species.
• Polyploid organisms often exhibit increased vigor, larger fruit or flowers, and improved resistance to diseases.
• Polyploidy is common in agricultural crops like wheat, cotton, and strawberries, which have multiple chromosome sets.
• The concept of polyploidy is important in the study of evolution as it can contribute to speciation.
• Some animals, like certain amphibians and reptiles, can also exhibit polyploidy, though it is more common in plants.

• Haploid: Haploid cells have only one complete set of chromosomes (n), such as gametes (sperm and egg cells) in humans. This is the opposite of polyploidy.
• Diploid: Diploid cells have two complete sets of chromosomes (2n), one from each parent, which is the typical chromosome number in somatic cells of most organisms.
• Polyhybrid: This term is not related to chromosome sets or cell ploidy. "Hybrid" generally refers to the offspring of two different species or varieties, but it does not describe chromosome number.
• Source: Genetics and Cell Biology Textbooks