Here's a breakdown:

* Heterozygote: An individual with two different alleles for a particular gene.

* Compound Heterozygote: A specific type of heterozygote where each of the two different alleles is a mutant version of the same gene.

Example:

Imagine a gene called "ABC" has two common alleles: A and B. A person who is heterozygous for this gene might have one A allele and one B allele.

Now, imagine a person inherits a mutated version of the A allele (let's call it A*) from their mother and a mutated version of the B allele (let's call it B*) from their father. This person would be a compound heterozygote for the ABC gene. They have two different mutant alleles, but both mutations affect the same gene.

Key Points:

* Both parents contribute: One mutant allele comes from each parent.

* Same gene: Both mutant alleles affect the same gene.

* Can lead to disease: Compound heterozygosity can result in disease, particularly if the gene is involved in a crucial function.

Let me know if you have any further questions!