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The Rat Litter Predictor

The Litter Predictor has been designed to calculate the probabilities of Colour, Coat type and Markings that can be expected in a litter, based on the information provided about the parents. The probability is calculated mathmatically using virtual Punnet Squares, and can predict the expected outcome of a litter for recessive or dominant genes.

It is worth noting that some genes are influenced by so many factors that they are impossible to predict accurately. Due to this, genes that are not dominant or recessive are not included in The Litter Predictor.
These include face markings (such as headspotted, lightning blazed and wedge blazed) and variations of the berkshire marking (Irish and Variegated) and variations on the hooded marking (capped, split capped, bareback).

The litter predictor is at Beta stage, meaning that it is ready for public testing. If you encounter any problems using The Litter Predictor, please contact us though the Contact Us page and describe the difficulties you encountered.

Currently, The Litter Predictor is exclusively for use with Australian rats, and includes only genes that are present in the Australian rat population.

How to use The Litter Predictor

There are three sections to The Litter Predictor, which can produce results independently of each other:
Colour, Markings and Coat Type.

For example, if a colour prediction is all that is required only the Colour section needs to be completed. The Markings and Coat Type sections can be left blank.

You don't have to enter a value for each and every section, however it is important to add as much detail about the parents of the litter as you can. The more information given about the parents the more accurate the calculation, and therefore the more accurate the prediction will be.

Please note that to use The Litter Predictor your web browser must have javascript and flash enabled

The Litter Predictor

The Dam

Colour	Pick one... AgoutiAgouti Blue MinkAlbinoApricotArgenteBlackBlack Eyed WhiteBlueBlue AgoutiBlue MinkBuffChampagneCinnamonDoveFawnMinkMink ChampagnePink Eye Blue MinkPink Eyed Blue (Silver)Pink Eyed Blue AgoutiPink Eyed Blue Mink AgoutiRuby Eyed BlueRuby Eyed Blue AgoutiRuby Eyed Blue MinkRuby Eyed Blue Mink AgoutiSilverfawn
Hidden Colour	Pick one... Don't Know AgoutiAgouti Blue MinkApricotArgenteBlackBlueBlue AgoutiBlue MinkBuffChampagneCinnamonDoveFawnMinkMink ChampagnePink Eye Blue MinkPink Eyed Blue (Silver)Pink Eyed Blue AgoutiPink Eyed Blue Mink AgoutiRuby Eyed BlueRuby Eyed Blue AgoutiRuby Eyed Blue MinkRuby Eyed Blue Mink AgoutiSilverfawn
Carried Genes	(pick colour) Non-Agouti Albino Black Eyed White Blue Mink Pink eye Ruby eye
Markings	Pick one... BerkshireHoodedSelf
	Downunder
Coat	Standard Single Rex Double Rex Silk Double Silk Silky Double Silky
Clear

The Sire

Colour	Pick one... AgoutiAgouti Blue MinkAlbinoApricotArgenteBlackBlack Eyed WhiteBlueBlue AgoutiBlue MinkBuffChampagneCinnamonDoveFawnMinkMink ChampagnePink Eye Blue MinkPink Eyed Blue (Silver)Pink Eyed Blue AgoutiPink Eyed Blue Mink AgoutiRuby Eyed BlueRuby Eyed Blue AgoutiRuby Eyed Blue MinkRuby Eyed Blue Mink AgoutiSilverfawn
Hidden Colour	Pick one... Don't Know AgoutiAgouti Blue MinkApricotArgenteBlackBlueBlue AgoutiBlue MinkBuffChampagneCinnamonDoveFawnMinkMink ChampagnePink Eye Blue MinkPink Eyed Blue (Silver)Pink Eyed Blue AgoutiPink Eyed Blue Mink AgoutiRuby Eyed BlueRuby Eyed Blue AgoutiRuby Eyed Blue MinkRuby Eyed Blue Mink AgoutiSilverfawn
Carried Genes	(pick colour) Non-Agouti Albino Black Eyed White Blue Mink Pink eye Ruby eye
Markings	Pick one... BerkshireHoodedSelf
	Downunder
Coat	Standard Single Rex Double Rex Silk Double Silk Silky Double Silky
Clear

Colour

Select the rat's colour using the dropdown box.

The Litter Predictor cannot calculate the probability of colours in a litter without knowing the colour of both parents.

If you are unsure about the colour of your rats, visit the Rat Colours page for a visual guide to Australian rat colours.

Hidden Colour

Both the Albino and BEW genes mask the true colour of the rat. Visit the Rat Genes page for further information.

Select the hidden colour of the rat using the dropdown box.

If a hidden colour is NOT selected, The Litter Predictor will assume that the hidden colour is Agouti (AADDMMRRPPNN).

Carried Genes

Tick the box next to each recessive gene that you know the rat carries.

The more accurate you are when choosing carried genes, the more accurate the colour prediction will be.

If you don't choose any carried genes, The Litter Predictor will, by default, assume that recessive genes are not carried.

For example, if the colour Agouti is chosen from the list and no carried genes are ticked, The Litter Predictor will assume that the rat is Agouti with no carried genes (AADDMMRRPPNN) and the prediction is made on that basis.

Markings

Choose the rat's markings using the dropdown box.

The Litter Predictor cannot predict the expected markings without the first knowing the markings of both parents.

If you are unsure about the type of marking your rats have, visit the Rat Markings page for a visual guide to Australian rat markings.

An additional marking option for 'Downunder' can also be selected if applicable.

Coat

Choose the rat's coat type using the dropdown box.

The Litter Predictor cannot predict the expected coat types without knowing the coat type of both parents.

If you are unsure about the type of coat your rats have, visit the Coat Types page for a visual guide to Australian coat types.

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When details for both of the parents have been added, click the button below