Which of these best describes incomplete dominance? When the dominant allele covers up the recessive allele. When both the dominant and recessive allele express a phenotype (like spots). When the dominant allele does NOT completely cover up the recessive allele and they MIX creating a third phenotype.

Which of these best describes incomplete dominance?

When the dominant allele does NOT completely cover up the recessive allele and they MIX creating a third phenotype.

Explanation:

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

the scientific method.