In a certain species of dog, a black nose is dominant over a pink nose. What would happen in a cross between a pure breed dominant male dog and a purebred recessive female?

Phenotype of the offspring?

Genotype of the offspring?

phenotype: black nose

genotype: Bb

Explanation:

Pure breed dominant genotype (BB)

+

recessive pure breed genotype (bb)

=

heterozygous genotype (Bb)

because black is dominant, thats the trait that will show. the pink will be masked by the black nose color.

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:

thinking it would be physical characteristics