Why do some organisms contain only 32 chromosomes?

Answer 1

Let's take for example, a simple fruit plant. What do you do when you are thirsty? You go to the kitchen and get a glass of water. Right? What do you do when you are hungry? You grab some food and eat. Well, plants can't move nor they can provide for themselves. So when they need water because it hasn't rain or there is a drought, they have other defense mechanisms to counterarrest these factors. By changing the color of their leaves, or by growing deeper roots, or perhaps they send signals that will make them stop growing. All these factors must be considered when we ask ourselves this questions. I hope that this will help students think more and brainstorm a little of why we only have 46 chomosomes. Perhaps in the future we will have less after we go through some mutation. Remember that mutation is a process of evolution.

Answer 2

Some organisms contain 0 chromosomes, for example prokaryotes whose DNA is formed into plasmids instead of chromosomes. Even among animals, chromosome numbers vary widely, for example 8 in the fruit fly and 132 in the kingfisher.

Answer 3

Some organisms have 32 chromosomes due to their evolutionary history and genetic makeup. Chromosomes can vary in number due to the processes of chromosomal rearrangements, duplications, fusions, and fissions during evolution. The number of chromosomes does not necessarily correlate with complexity or genetic diversity in an organism.