Transcription is when DNA unzips itself in half and it becomes smaller so it can leave the nucleus.
the end result of transcription is half of a DNA strand, which is called mRNA.
Messenger RNA is decoded by a ribosome outside the nucleus, to produce a specific amino acid chain, or a polypeptide. It later turns into an active protein and performs its cell function.
The end result of translation is a protein.
If mistakes happen during either one of these processes , it would alter the DNA and change what the child is going to look like They could have a facial disorder, or just look different and have different traits then the parents do.