What is the difference between a dominant trait and a recessive trait? Dominant traits will be expressed even if there is one of them while for recessive both of the parents have to have a recessive trait

Dominant traits will always be expressed if any amount is there. Recessive traits will only be expressed if two are there.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.