3. If tall eyeballs (T) are dominant to short eyeballs(t), give the genotypes that are possible for members of Mr.
Krabbs' family.
Tall eyeballs =
1

Tt, TT

Explanation:

Dominant genes are genes that express themselves over recessive genes. This are expressed on such individual and are visible phenotypically. While recessive genes are genes whose effect are masked and not expressed. They may be present in the genome of an individual but are not usually expressed.

For an individual with a dominant tall eye ball(T)over short eye ball(t), Tall eye ball will always be expressed as TT having similar allele or Tt with a different allele but in a dominant form.

sorry, but you do not have posted the diagram.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.