If I understand the question correctly, yes you would have a plant of the same genetic (produced breed true). But you can end up with hermaphrodites like the picture below.
Very unusual but happens sometimes.
This is a plant that has both sexes.
Article taken from: Difference between male and female marijuana and cannabis plants and Hermaphrodite Marijuana Plants
What is a Hermaphrodite plant?
An hermaphrodite, or hermie, is a Marijuana
plant of one sex that develops the sexual organs of the other sex. Most commonly, a flowering female Marijuana
plant will develop staminate flowers, though the reverse is also true. Primarily male hermaphrodites are not as well recognized only because few growers let their males reach a point of flowering where the pistillate would be expressed.
Hermaphrodites are generally viewed with disfavor. First, they will release pollen and ruin a sinsemelia crop, pollinating themselves and all of the other females in the room. Second, the resulting seeds
are worthless, because hermaphrodite parents tend to pass on the tendency to their offspring.
Please note that occassionally specious staminate flowers will appear in the last days of flowering of a female Marijuana
plant. These do not drop pollen and their appearance is not considered evidence of deleterious hermaphroditism.
Here's an image of a hermaphrodite, specifically a female Marijuana
plant with staminate flowers.
For more pictures of Hermaphrodite marijuana plants visit our Marijuana Picture Gallery