Genes

* Definition: A gene is a segment of DNA that contains the instructions for building a specific protein or functional RNA molecule.

* Function: Genes are responsible for traits, like eye color, hair color, or height.

* Example: A gene responsible for eye color.

Alleles

* Definition: Alleles are different versions or forms of a gene. They occupy the same position (locus) on a chromosome.

* Function: Alleles determine the specific variations of a trait.

* Example: There are multiple alleles for eye color, resulting in variations like blue, brown, green, and hazel eyes.

Key Differences

| Feature | Gene | Allele |

|---|---|---|

| Definition | Segment of DNA containing instructions for a protein or RNA | Alternate form of a gene |

| Function | Responsible for traits | Determines specific variations of a trait |

| Relationship | Alleles are different versions of a gene | Genes are the basic unit of inheritance, alleles are variations of those units |

Analogy

Think of it like this:

* Gene: A recipe for a cake

* Allele: Different versions of the recipe (e.g., chocolate cake, vanilla cake, strawberry cake)

Important Note: You inherit one allele for each gene from your mother and one from your father. These alleles, together, determine the expression of the trait.