Alpaca Coat Colour Prediction Tool

Genetic Insights for Colour Prediction Tool Breeding Decisions

Alpaca Coat Colour Prediction Tool

Genetic Insights for Colour Prediction Tool Breeding Decisions

This guide will help you understand how to use our tool to predict the coat colour of your alpaca offspring based on the genetic information of the sire (male) and dam (female).

Step-by-Step Instructions

1. Gather Genotype Information

Before you start, you need to have the genetic information for both the sire and dam. This includes:

  • MC1R Gene (E/e): Determines if the alpaca produces black pigment (eumelanin) or red/yellow pigment (pheomelanin).
    • E: Functional allele for eumelanin.
    • e: Non-functional allele.
  • ASIP Gene (A/a): Regulates the distribution of pigment.
    • A: Promotes pheomelanin (light colour).
    • a: Promotes eumelanin (dark colour).
  • Grey Gene: Indicates whether the alpaca has the dominant grey allele.

You can obtain this genetic information through a genetic testing service for alpacas.

2. Enter Genotype Information

Open the calculator form and input the genotype information for both the sire and dam:

  • Sire Genotype:
    • MC1R (E/e): Enter the alleles (e.g., EE, Ee, or ee).
    • ASIP (A/a): Enter the alleles (e.g., AA, Aa, or aa).
    • Grey Gene: Select either “grey” or “non-grey”.
  • Dam Genotype:
    • MC1R (E/e): Enter the alleles (e.g., EE, Ee, or ee).
    • ASIP (A/a): Enter the alleles (e.g., AA, Aa, or aa).
    • Grey Gene: Select either “grey” or “non-grey”.

3. Calculate the Results

Click the “Calculate” button to process the entered genetic information. The calculator will combine the alleles from both parents to predict the possible coat colours of their offspring.

4. Understand the Results

The results section will display the predicted coat colour percentages for the offspring. This is based on the genetic combinations of the MC1R and ASIP genes and the presence of the grey gene.

Explanation of Genotype to Coat Colour Mapping

  • MC1R and ASIP Combinations:
    • EE AA: White
    • EE Aa: Light Fawn
    • EE aa: True Black
    • Ee AA: White
    • Ee Aa: Light Fawn
    • Ee aa: Bay Black
    • ee AA: White
    • ee Aa: Light Fawn
    • ee aa: Dark Brown
  • Grey Gene Influence:
    • If either parent carries the grey gene, there will be a 50% probability of grey offspring. If both parents carry the grey gene, there is a 25% chance of embryonic lethality and a 50% probability of grey offspring, which overrides the base colour.

Detailed Example

Let’s say you have the following genotypes:

  • Sire: MC1R (Ee), ASIP (Aa), Grey (non-grey)
  • Dam: MC1R (ee), ASIP (aa), Grey (grey)

When you enter these genotypes and click “Calculate,” the calculator will process the possible combinations:

  • Possible MC1R combinations: Ee, ee
  • Possible ASIP combinations: Aa, aa
  • Resulting Combinations:
    • Ee Aa (Light Fawn)
    • Ee aa (Bay Black)
    • ee Aa (Light Fawn)
    • ee aa (Dark Brown)

Since the dam is grey, there will be an additional 50% chance of the offspring being grey, overriding the base colours.


Q1: Why does the grey gene override the base colour? The grey gene is dominant and causes progressive depigmentation, resulting in a grey coat regardless of the underlying base colour.

Q2: What does homozygous lethality of the grey gene mean? It means that having two grey alleles (one from each parent) often results in non-viable embryos, which affects breeding decisions and offspring outcomes.

Q3: Can I use the calculator for alpacas with known genetic issues? The calculator is designed for standard colour prediction and may not account for specific genetic disorders or non-standard gene interactions.


This information is provided as a simple guideline and may not be 100% accurate. It should be used as such. For precise genetic testing and breeding advice, please consult a professional geneticist or a veterinarian with experience in alpaca genetics.

We hope this guide helps you effectively use the Alpaca Colour Prediction Calculator on Churchfield Alpacas.

Alpaca Colour Prediction Calculator

Sire Genotype

Dam Genotype

Allele Codes and Their Colours

EE AAWhite
EE AaLight Fawn
EE aaTrue Black
Ee AALight Fawn
Ee AaDark Fawn
Ee aaBay Black
ee AALight Brown
ee AaDark Brown
ee aaTrue Black
Grey (Any combination)Grey (overrides base color)

Alpaca Birthing Calculator

Alpaca Gestation Calculator

Alpaca Gestation Calculator! This tool is designed to help alpaca breeders and owners estimate the expected birth dates of their alpacas based on the mating date. Alpacas typically have a gestation period ranging from 335 to 355 days. By entering the mating date into the calculator, you can quickly find out the earliest and latest expected birth dates for your alpaca.

How It Works:

  1. Enter the Mating Date: Select the date when your alpaca was mated using the date picker.
  2. Calculate Birth Dates: Click the “Calculate Birth Dates” button to see the results.
  3. View Results: The calculator will display the earliest and latest expected birth dates based on the entered mating date. This range accounts for the typical 335 to 355-day gestation period.


  • User-Friendly: Simple and intuitive interface for quick and easy calculations.
  • Accurate Estimations: Provides a reliable range of expected birth dates based on industry-standard gestation periods.
  • Instant Results: Get immediate feedback without any waiting.

Use this tool to plan and prepare for the arrival of your new cria, ensuring you are ready for this exciting event. Whether you’re a seasoned breeder or new to alpaca care, our Alpaca Gestation Calculator is an essential resource for managing your herd.

Earliest Expected Birth Date:

Latest Expected Birth Date:

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