Final answer:
The extent of the haplotype block surrounding a disease mutation depends on marker phasing and recombination frequency in the region.
Step-by-step explanation:
The extent of the haplotype block surrounding a disease mutation depends on two factors: Marker phasing and Recombination frequency in the region. Marker phasing refers to the arrangement of genetic markers on a chromosome, which can affect the size of the haplotype block. Recombination frequency in the region determines the likelihood of genetic recombination occurring and breaking apart the haplotype block.