A distinguishing characteristic about eukaryotic cells is that they have membrane bound organelles

Translation is when the genetic code in RNA is translated into a specific sequence of amino acids and, ultimately, different proteins

A gametic barrier is a type of prezygotic barrier that occurs when closely related individuals of different species mate, but differences in their gametes prevent fertilization from taking place

DNA is a double stranded, helical molecule 

Somatic cells are body cells; all the cells that aren’t gametes

A codon is three consecutive nucleotides in an mRNA strand that specify the insertion of an amino acid or the release of a polypeptide chain during translation

When a gene being examined is present on the X chromosome, but not on the Y chromosome, it is said to be X-linked

Stabilizing selection is a form of selection that favors average phenotypes

Gene flow refers to the flow of alleles in and out of a population due to individual or gametic migration

The number of protons and neutrons determine an element’s mass number