---
icon: jurassic-saga:icons/genes.gif
history:
  - version: 0.1
    changes:
      - And start
---

# Genes


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    The last update on this page was on: 16th August 2026 (v0.2.1)
</Callout>

## Genetic Modifications

**Genes** are items that can be applied to prehistoric creatures to change appearance, behavior, stats, or biological traits.
Some genes are **cosmetic** only; others provide **functional** bonuses that affect combat, survival, or life cycle.
Not every gene works on every creature. Some genes are **stackable**, some are **species-restricted**, and some are **unimplemented** or reserved for future updates.

---

## Categories

### Cosmetic Genes
Purely visual changes that alter a creature's **texture**, **pattern**, or **coloration**.
Cosmetic genes do not change stats or behavior.

**Examples:**
- **Alpine Cosmetic**
- **Arid Cosmetic**
- **Chaos Effect Cosmetic**
- **Forest Cosmetic**
- **Jungle Cosmetic**
- **Legacy Cosmetic**
- **Ocean Cosmetic**
- **Pasture Cosmetic**
- **Rainforest Cosmetic**
- **River Cosmetic**
- **Savanna Cosmetic**
- **Special Cosmetic**
- **Steppe Cosmetic**
- **Taiga Cosmetic**
- **Tropical Cosmetic**
- **Tundra Cosmetic**
- **Vivid Cosmetic**

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### Functional Genes
Modify stats, abilities, or life cycle. See the list below for details and current status.

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## Functional Genes

> Each entry lists the gene name, its effect, and whether it is currently implemented.

#### Aggressive Instinct
- **Effect:** Increases aggression by **0.25**

#### Bone Density
- **Effect:** **+10 Armor Toughness**; **+10 Armor**

#### Cathemeral Active Time
- **Effect:** Under development

#### Crepuscular Active Time
- **Effect:** Under development

#### Frequent Ovulation
- **Effect:** Increases breeding frequency

#### Gender Lean (Male / Female)
- **Effect:** Forces the creature to the specified gender

#### Immune Response
- **Effect:** Under development

#### Infertility
- **Effect:** Prevents the creature from breeding

#### Intensive Repair
- **Effect:** Increases natural regeneration from **1 heart** to **5 hearts**

#### Intolerance Time
- **Effect:** Under development

#### Lightweight Skeleton
- **Effect:** **+0.25** movement speed

#### Lux Gene
- **Effect:** Adds a glow layer based on external lighting

#### Lysine Deficiency
- **Effect:** Under development

#### Matutinal Active Time
- **Effect:** Under development

#### Nocturnal Active Time
- **Effect:** Under development

#### Parental Investment
- **Effect:** Babies grow faster when near their parents

#### Macrosoma
- **Effect:** Increases model scale by **+0.1%** per application
- **Stacking:** Up to **4** times

#### Microsoma
- **Effect:** Decreases model scale by **−0.1%** per application
- **Stacking:** Up to **4** times

#### Skin Toughness
- **Effect:** **+5 Armor Toughness**; **+20 Armor**

#### Tooth Hardness
- **Effect:** **+8 Attack Damage**

#### Toxic Skin
- **Effect:** When the creature is hit, the attacker receives **100 ticks of Wither**

#### Ultradian Active Time
- **Effect:** Under development

#### Venomous Bite
- **Effect:** Creature melee attacks inflict **100 ticks of Wither**

#### Vespertine Active Time
- **Effect:** Under development

---

## How to Obtain Genes

Genes are **not** dropped by mobs. Use a **Syringe** on a specific vanilla mob to extract that mob's associated gene.

<table>
    <thead>
    <tr>
        <th style={{textAlign: "left"}}>Gene</th>
        <th style={{textAlign: "left"}}>Extracted From</th>
    </tr>
    </thead>
    <tbody>
    <tr>
        <td>Aggressive Instinct</td>
        <td>Allay</td>
    </tr>
    <tr>
        <td>Skin Toughness</td>
        <td>Armadillo, Guardian</td>
    </tr>
    <tr>
        <td>Arid Cosmetic</td>
        <td>Camel</td>
    </tr>
    <tr>
        <td>Venomous Bite</td>
        <td>Cave Spider, Dilophosaurus, Dracovenator</td>
    </tr>
    <tr>
        <td>Male Gender Lean</td>
        <td>Cod</td>
    </tr>
    <tr>
        <td>Pasture Cosmetic</td>
        <td>Cow</td>
    </tr>
    <tr>
        <td>Ocean Cosmetic</td>
        <td>Dolphin</td>
    </tr>
    <tr>
        <td>Lightweight Skeleton</td>
        <td>Enderman</td>
    </tr>
    <tr>
        <td>Taiga Cosmetic</td>
        <td>Fox</td>
    </tr>
    <tr>
        <td>Female Gender Lean</td>
        <td>Frog</td>
    </tr>
    <tr>
        <td>Lux Gene</td>
        <td>Glow Squid</td>
    </tr>
    <tr>
        <td>Alpine Cosmetic</td>
        <td>Goat</td>
    </tr>
    <tr>
        <td>Steppe Cosmetic, Lysine Deficiency</td>
        <td>Llama</td>
    </tr>
    <tr>
        <td>Parental Investment</td>
        <td>Panda</td>
    </tr>
    <tr>
        <td>Rainforest Cosmetic</td>
        <td>Parrot, Reed Frog</td>
    </tr>
    <tr>
        <td>Tundra Cosmetic</td>
        <td>Polar Bear</td>
    </tr>
    <tr>
        <td>Frequent Ovulation</td>
        <td>Rabbit</td>
    </tr>
    <tr>
        <td>Forest Cosmetic</td>
        <td>Rabbit</td>
    </tr>
    <tr>
        <td>Macrosoma</td>
        <td>Ravager</td>
    </tr>
    <tr>
        <td>River Cosmetic</td>
        <td>Salmon</td>
    </tr>
    <tr>
        <td>Microsoma</td>
        <td>Silverfish</td>
    </tr>
    <tr>
        <td>Bone Density</td>
        <td>Skeleton</td>
    </tr>
    <tr>
        <td>Intensive Repair</td>
        <td>Sniffer</td>
    </tr>
    <tr>
        <td>Immune Response</td>
        <td>Snow Golem</td>
    </tr>
    <tr>
        <td>Intolerance Time</td>
        <td>Warden</td>
    </tr>
    <tr>
        <td>Tooth Hardness</td>
        <td>Wolf</td>
    </tr>
    <tr>
        <td>Chaos Effect Cosmetic</td>
        <td>N/A</td>
    </tr>
    <tr>
        <td>Jungle Cosmetic</td>
        <td>N/A</td>
    </tr>
    <tr>
        <td>Legacy Cosmetic</td>
        <td>N/A</td>
    </tr>
    <tr>
        <td>Savanna Cosmetic</td>
        <td>Ostrich</td>
    </tr>
    <tr>
        <td>Special Cosmetic</td>
        <td>N/A</td>
    </tr>
    <tr>
        <td>Tropical Cosmetic</td>
        <td>Alligator</td>
    </tr>
    <tr>
        <td>Vivid Cosmetic</td>
        <td>Bonito</td>
    </tr>
    <tr>
        <td>Nocturnal Active Time</td>
        <td>Dilophosaurus, Troodon</td>
    </tr>
    <tr>
        <td>Crepuscular Active Time</td>
        <td>Dracovenator</td>
    </tr>
    <tr>
        <td>Toxic Skin</td>
        <td>Reed Frog</td>
    </tr>
    </tbody>
</table>

---

## Usage

- Apply genes using the **DNA Modifier** component
- **Cosmetic genes** override the creature's default texture immediately
- **Functional genes** apply their stat or behavior changes immediately upon application
- Some genes **stack** (for example, **Macrosoma** and **Microsoma**); stacking limits are noted above
- **Genes are permanent** once applied and cannot be removed

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## Notes & Limitations

- **Species restrictions:** Some genes will not apply to certain creatures
- **Unimplemented genes:** Genes marked as "Under development" have no effect until implemented
- **Balance:** Applying multiple powerful genes can significantly change gameplay balance
- **Irreversibility:** Genes cannot be removed after application

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## Trivia
- The genetic modification system in Jurassic Saga is inspired by the DNA manipulation featured in Jurassic World Evolution
- Multiple genes from the same mob (like Llama providing both Steppe Cosmetic and Lysine Deficiency) reference the complexity of real genetic engineering

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