If you get a sex change, then yes, it is very possible to change your gender.
No, plants don't have genders.
cell genders
It is not possible to say because the children's genders are not independent.
Yes, it's possible for a mutation in the chromosome to produce otherwise-identical twins with opposite genders. But generally no, identical twins have the same gender. (but fraternal twins have different genders just as often as any siblings)
The different genders make it possible for reproduction, and thus the continuation of human life.
It is not possible to change genders ,even if they are snakes, may change colour.
Being bisexual does not mean that someone needs to have sex with people of both genders. It merely means that they are attracted to people of both genders. So it is possible for someone to "be enough" for a bisexual.
Tuffy Genders's birth name is Harold Genders.
Male, female, and shmales are the genders
The correct phrase is "both genders."
Male and female are the different genders.
No. Many languages have three genders.