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Sexual dimorphism is the condition where sexes of the same species exhibit different morphological characteristics, including characteristics not directly involved in reproduction. [1]
The gender gap in life expectancy suggests differences in the aging process between males and females. A key factor underlying aging is considered to be DNA damage , particularly DNA double-strand breaks, and the capability to repair these damages declines with age. [ 128 ]
Gender, on the other hand, is the social and psychological sense one carries of being male, female or any of the multitude of gender identities said to exist outside of the conventional ...
The term may be used as "an umbrella term, encompassing several gender identities, including intergender, agender, xenogender, genderfluid, and demigender." [ 22 ] Some non-binary identities are inclusive , because two or more genders are referenced, such as androgyne/androgynous, intergender, bigender, trigender, polygender, and pangender.
The Oxford Etymological Dictionary of the English Language of 1882 defined gender as kind, breed, sex, derived from the Latin ablative case of genus, like genere natus, which refers to birth. [25] The first edition of the Oxford English Dictionary (OED1, Volume 4, 1900) notes the original meaning of gender as "kind" had already become obsolete.
The change from the one-sex model to the two-sex model helped to create a new understanding of gender in the meaning of human history. There is an "increasing differentiation of male and female social roles; conversely, a greater differentiation of roles and a greater female 'delicacy and sensibility' are [seen as] signs of moral progress."
The Nematocera, particularly the Simuliids and Chironomus, have sex determination regions that are labile, meaning that one species may have the sex determination region in one chromosome, but a closely related species might have the same region moved to a different non-homologous chromosome.
Internal religious issues are studied from the perspective of a given religion, and might include religious beliefs and practices about the roles and rights of men and women in government, education and worship; beliefs about the sex or gender of deities and religious figures; and beliefs about the origin and meaning of human gender.