Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein.
Prophase 1 of meiosis <span>relative to the number of chromosomes of a given species, accounts for a significant amount of genetic variation in gametes.</span>
