Why do all organisms have an even number of chromosomes?

The reason why the majority of organisms have an even number of chromosomes is because chromosomes are in pairs. A human, for instance, ... An example of a haploid cell would be a gamete (a sperm cell, for instance), and a diploid cell would be a skin cell of a person with 46 chromosomes. Wikipedia. read more

The reason why the majority of organisms have an even number of chromosomes is because chromosomes are in pairs. A human, for instance, will have half its chromosomes from the father, and half from its mother. read more

All organisms, leaving out a select few have to have an even amount of chromosomes because they all sexually reproduce. Therefore when they go through Meiosis and Mitosis they need a even number to reproduce. read more

In the diploid state, the organism has pairs of homologous chromosomes, one of which came from its mother and one from its father. Thus, it always has an even number of chromosomes. In the haploid state, the organism has only a single chromosome from each pair. Thus, it may have either an even or an odd number of chromosomes. read more