It draws a conclusion based on what would best explain one's observations.
Inference is the process where logical consequences evolve from premises that are assumed to be true. Knowledge backed with observations and reasoning as evidence is used to make conclusions. It is also referred to as an educated guess and is not necessarily factual.
D. A condition that causes narrowing of the coronary arteries so blood flow to the heart muscle is reduced carotid arteries
My guess:
I do not know the options to the blanks, but I'd say that the answer to the first one is "strongly linked". Think of a chromosome as a phylogenic chart → 2 species that are beside each other are strongly linked, if compared to 2 species 3 spots apart form each other. So, 2 genes that are close to each other are strongly linked.
I do not know the options to the blanks, but I'd say the answer to the second one is epistasis → which is the interaction between two different genes (different means they're not linked alleles).
Hope it helped,
BioTeacher101
The answer would be CODOMINANCE because codominance is when 2 genotypes show up at the same time on an object, where incomplete dominance is when 2 different genotypes combine and create a whole new phenotype