Which class of Phylum Chordata includes animals with feathers and porous, lightweight bones?

Class Aves

Explanation:

Class Aves consist of birds. Birds have feathers and lightweight bones to help them fly.

you dont brother god luck

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.