Final answer:
The abundance of mRNA from gene A in the fat tissues of obese and lean pigs indicates a difference in gene expression associated with obesity.
Step-by-step explanation:
The subject of this question is Biology. The question is asking about the abundance of mRNA from gene A in the fat tissues of obese and lean pigs. If mRNA from gene A is very abundant in the fat tissues of obese pigs and rare in the fat tissues of lean pigs, it indicates that the expression of gene A is associated with obesity.
This can be explained by the fact that mRNA is transcribed from DNA and serves as a template for protein synthesis. In this case, the abundance of mRNA suggests that the gene A is highly expressed in the fat tissues of obese pigs, which could be related to pathways involved in fat metabolism, storage, or other processes associated with obesity.
This difference in gene expression between obese and lean pigs may contribute to the development and maintenance of obesity in the obese pigs.