Actually, Yes, they can. it is possible but very risky. It should never be tried the other way though; that is impregnating a female guppy with a male molly. the guppy/molly mix would be/have been referred to as gollies and they wouldn't be able to produce offspring, since they are essentially mules.
I believe that female guppies can store male sperm in their bodies until the environment is just right and then they will use it to become pregnant at will.
Depending how old it is, if it is an adult female and it is in with male guppies then it is very likely that it is pregnant. (:
No, unless a) the female fish got pregnant before the male died, or b) you buy a new male guppy and put him in with the female.
female mollies chase male mollies so they can mate or have babies.!!
Guppies would show a lot of different colours whereas the molly doesn't have as many colours as the guppy. Guppies and mollies however are said to be delicate fish so you must be careful what you put in your tank. Male fighting fish would think the brightly coloured guppy tails are other male fighting fish and would try and fight them. Mollies would tend to nip at fish with long fins. Both mollies and guppies are friendly. They are both active and eat a lot.
the male fish will protect the female if there are other fish. just make sure when your guppies have hatched, they are safe in a other tank.
What are guppies
yes.
The mollies don't have to be the same color. But make sure that you have more than one female when you have a male because the males tend to horass the females when they become pregnant.
I believe some, and the spot you're referring to is a gravid spot.Mollies, unlike guppies, don't have as much transparency to their bodies as guppies do and might not show a gravid spot (but they do have them all the same).Mollies plump up a lot when pregnant as well, it will defiantly be noticeable.You can also check the sex of the fish as well; if the anal fin (the one at the bottom of their bodies) is long, "pointed" and usually kept rolled up close to their bodies, it's a male, if the anal fin is rounded and "fan-shaped", it's a female.
Male guppies are considerably smaller than females of the same species.
Male guppies have a pointier anal fin and a bigger tail than the female and the female is larger than the male.