If A is the allele for brown hair and a is the allele for blond hair, how many children will have brown hair

allele B

Genes can be several alternative types called alleles example : allele B for brown hair, or b for blond. You inherit two alleles (one from each parent). A Dominant allele has an effect whether you have one copy of it, or two copies. eg BB or Bb (brown hair).

Explanation:

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.  

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question