Do all species have the same number of genes?
All living things evolved from a common ancestor. Therefore, humans, animals and other organisms share many of the same genes, and the molecules made from them function in similar ways. … Researchers have found many genes that have been preserved in multiple organisms for millions of years.
Why don t all species have the same number of chromosomes?
Species (and individuals) are unique because of the content of the DNA that makes up the chromosomes, not the number of chromosomes. As you may already know, chromosomes are made of tightly packed DNA, and DNA is made of incredibly long strands of chemicals called nucleotides.
Which species has the most pair of chromosomes?
The organism with the highest chromosome number recorded in to date is estimated to be 1,440 (or 720 pairs) found in the adder’s tongue fern Ophioglossum reticulatum.
What if a person has 47 chromosomes?
Humans have 23 pairs of chromosomes. A trisomy is a chromosomal condition characterised by an additional chromosome. A person with a trisomy has 47 chromosomes instead of 46. Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
Are all species the same?
A species is often defined as a group of individuals that actually or potentially interbreed in nature. … For example, these happy face spiders look different, but since they can interbreed, they are considered the same species: Theridion grallator.
Do all species have the same number of chromosomes support your answer?
All organisms do not have the same number of chromosomes. For example, human cells have 46 chromosomes, each whereas dogs have 39 chromosomes in each…
Is all DNA the same?
Although each organism’s DNA is unique, all DNA is composed of the same nitrogen-based molecules. … In turn, this pattern of arrangement ultimately determines each organism’s unique characteristics, thanks to another set of molecules that “read” the pattern and stimulate the chemical and physical processes it calls for.