How long does it take for Guppies (male and female) to physically and sexually mature?

Question

My 3 female Guppies had 10 babies a while back. The first fry were a group of 4, and are about (maybe) half their full grown size and are starting to get yellow on their tails. Little while later a group of 6 fry came and at the moment they are about a 3rd the size of the older fry.

1.) How long does it take for Guppies (male and female) to physically and sexually mature?
2.) What is the dominant gene in guppies; Red, Blue, Orange, or Yellow (in order)? Spots or No Spots?
3.) How long will it take for my Guppies to show their true colors?
4.) If my fry start their colors off at yellow will they end at yellow, or could they most likely change more (like to Blue or Red)?
5.) And when do fry start getting they colors? My younger fry, (only a cm long) got some black on their bodies, while my older ones, (2 1/2 cm long) only now started getting some yellow

I'd get a Guppy-keeping hand book, but it's checked out of my Public library at the moment.

Answer 1

1- This differs depending upon tank conditions and feeding. The more frequent feeding and better water quality the faster they will grow and mature. Also, warmer water temperatures seem to increase growth rate while cooler ones reduce growth rate in newly born fry.
2-The dominant gene is gray. A guppy will return back to it's wild roots if there is any chance in it's genes for it to do so. The wild guppies have a few colors, lines, and spots but not the plumage of the fancy guppies most people associate with the word guppy.
3,4,5-The females will mature sooner than the males, but you should start seeing colors within 1.5 - 2 months. Once they start showing color, this color will not likely change. There might be more color added as it ages, but a blue should not turn red. The males will be more obvious with color than the females and will start to show color at a smaller size.

Answer 2

I actually just had guppy fry, they are about 1 week old now.
Females stay pretty much light grey
The one male I have, has already vibrant colors, beautiful