Final Answer:
Linkage disequilibrium is advantageous for a new allele as it increases the likelihood of the new allele being inherited with nearby genetic variants, allowing it to spread through a population more efficiently.
Step-by-step explanation:
Linkage disequilibrium refers to the non-random association of alleles at different loci. In the context of a new allele, being in linkage disequilibrium with neighboring alleles means that it is inherited together with these alleles more often than expected by random chance.
This can be beneficial for a new allele, especially if it confers a selective advantage. The close association with other favorable alleles can lead to a higher frequency of the new allele in the population over generations, promoting its spread.