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All the secondary sexual characteristics.
Umm. Many things can occur in height and weight'
It will grow in length, girth, and the boy will start getting erections.
You might find that you have... *mood swings *like girls/boys A LOT
they're the same thing, how old are you?
There are many non-physical changes that occur during adolescence, most notably the large increase in the number of conections between neurons in the brain. this is what causes the sporadic behaviour in adolescents, and helps the brain and personality to develop by 'trimming' the unnecessary synapses. The flood of hormones (testosterone and oestrogen in men and women respectively) that causes the physical changes also cause a development in the sexuality of the adolescent (it makes the horny).
waht changes in the chromosomes occur during meiosis
Physical changes
Mood swings may occur frequently during adolescence. It can affect their relationships with their near and dear ones.
Turns in to a bird
In Male : Beards and other hairs in genital area , deepening of voice , enlargement of penis , release of sperm , maturity , In female : Development of breasts , Pubic hair , Darkening of nipples , loud voice ,