Middle adulthood extends from ages
a. 30 to 50
b. 35 to 55
c. 40 to 60
d. 45 to 65

A because those are even numbers that are half or close to 100

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.