Answer:
<em>Sex Roles</em>
Explanation:
A sex role, also known as a gender role, is really <em>a social role that incorporates a spectrum of behaviors and mentalities which are widely considered "appropriate", suitable, or appealing for individuals based on their perceived or biological gender. </em>
They are generally focused on masculinity and femininity perceptions even though there are exemptions and differences.
The details related to such gendered expectations can vary considerably between traditions, whereas other traits might be popular across a variety of cultures.
In society, it suggests how we're expected to behave, talk, dress, groom and behave on the basis of our assigned gender.
I believe the answer is: the Columbian Exchange
Columbian exchange refers to the exchange of knowledge, labour culture, plants , and animals that heppened between countries in american continent during the 1500s. When the exchange happens, different races crossbreed with one another which resulted in the birth of new races.
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Http://www.un.org/un70/en/content/70ways