How to solve these questions

(i) An allele is a variant of a gene, can either be short or tall.

Dominant = the tall allele that "trumps" the short allele. if a dominant and recessive allele is present (heterozygous) then the dominant phenotype will be shown.

(ii) David's eyes are Brown

(iii) Sarah's eyes are blue

(iv) David - B, b

Sarah - b, b

(v) Possible genotypes include Bb and bb. These give the phenotypes of brown eyes or blue eyes.

(vi) The chance for blue eyes is 50% (or 1:1 ratio)

wheres the answers ?

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.