The person suspected of committing a crime is an identical twin. to determine which twin committed the crime, scientists would need to analyze their:

One set of identical twins, two different ancestry profiles. ... Despite having virtually identical DNA, the twins did not receive matching results from any of the companies. In most cases, the results from the same company traced each sister's ancestry to the same parts of the world — albeit by varying percentages.

Explanation:

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.