A Graphic used to help predict the possibility
of different gametes

Punnett squares and probability.

A Punnett square can be used to predict genotype and phenotypes of offspring from genetic crosses.

Each parent produces one kind of gamete, resulting in an F{1} generation with a dominant yellow phenotype and the genotype Yy

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:

i think the answer would be d