Klinfelters syndrome is when there is an extra X chromosome in males.
So instead of the normal sex chromosomes for males (XY), a male with klinefelters syndrome will have XXY.
I have included a pic of the karyotype to give you a better idea of what I'm talking about.
Hope this helps! I'm happy to help with any other questions you might have :)
Reducing the activation energy can increase the rate of a reaction. Reducing the activation energy would mean that less energy is required to process a reaction, whereas increasing activation energy would require more energy to process a reaction.
Molecular homology, because it compares dna