Scientists test a hypothesis with a
experiment.

yes

Explanation:

A hypothesis is what the expect to happen and they have to test it to see if they were right or wrong

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.

your answer is "the 1950's"