Male and Female.
The gender of siblings can vary, as siblings can be of the same gender (e.g., two sisters or two brothers) or different genders (e.g., a brother and sister).
female?
Yes, waterboatmen have two sexes.
fraternal twins have two different chromosomes
Culture
Gender and weight.
The square of two decimal points
yes, two males will definitely fight.
The common gender of mankind is generally considered to be both male and female, as it encompasses all individuals regardless of their gender identity.
There are only two gender in this world but people become themselves as a third gender and indentify as a gay .
You cannot get pregnant two days after ovulation. During ovulation however, gender is 50/50. You will be able to see which gender your child is after being pregnant for 7 weeks.
man and women had two roles