Well, The Male Zebra Danio are usually "Smaller and Slimmer" while the Females are Bigger especially when they are going to have fry.
The same way you tell if it's a boy or girl dog or human.
HOW YOU KNOW IF A TEDDY BEAR HAMPTER IS A BOY OR A GIRL YOU CAN TELL YOUR HAMPTER IS A BOY OR A GIRL BY LOOKING AT ITS BUT AND SEAING IF ITS A BIG POUCH THEN IT WOULD BE A BOY
He's a boy, cant you tell by the name?
uhmmm..... penises?
Because a girl dog has a female part and the boy dog has a male part that's how you can tell from the female dog and the male dog the way you can tell you watch the way they pee. boys stick their leg up and girl don't.
First I'd best tell you that any kind of fish can be genetically altered to make it a 'glo-fish'. The most common species available is the Zebra danio. (Danio rerio). If it is a Zebra danio, the females are chubbier than the males around the tummy when they are in reasonable condition.
when they mate they get 2 Y genes from the mom(the zebra or the quagga) and 2 X genes from the Dad( the zebra or the quagga) and then they combine and which genes are dominant tell whether its a girl or boy
A boy zebra and a girl zebra. Zebras are not a hybrid. Mules and Zorses are.
how do i tell if my my turtle is a girl or a boy?...
you cannot tell if the caterpillar is boy or girl
can you tell if a fish is a boy or girl by the tail
its harder for a boy to tell if a girl likes him
YOu can not tell the difference between a girl or boy starfish.
by asking its mother if it is a girl or a boy and plus you can tell by the face
you can tell if its a girl or a boy byits butt or eyes. if its a girl, it will have small pupils. if itsa boy, it will have large pupils.
i don't know if it is a boy or a girl
It can be either way, a girl can tell a boy that she loves him or a boy can tell a girl that he loves her.