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Answer:

Ploidy is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes. For many organisms, especially plants and fungi, changes in ploidy level between generations are major drivers of speciation

Explanation:

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luisvaschetto

Meiosis and fertilization are cellular processes capable of changing the ploidy level.

  • The ploidy level refers to the number of sets of homologous chromosomes in a given cell type.

  • Meiosis is a type of cell division that is capable of reducing the number of chromosomes in the parent cell and thus produces four (4) gametes or germ cells.

  • These gametes contain half the normal (i.e., somatic) number of chromosomes.

  • During fertilization, two gametes combine to re-establish the ploidy level, i.e., the normal chromosome number in somatic cells.

  • Thus, fertilization can restore the ploidy level of the parents.

In conclusion, meiosis and fertilization are cellular processes capable of changing the ploidy level.

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