Chlamydia is caught be having sex (oral, anal, genital) with an infected person, regardless of the sex of either partner.
Yes; chlamydia can still be spread without ejaculation.
Male humans have a different genetic structure from females, consisting of an X and a Y chromosome, where females have two X chromosomes. The genetic difference accounts for various differences...
Yes you can still get pregnant.
Yes a male can infect a female with chlamydia.