Chromosome become visable, they are nearing equator of cell, spindle fibres begin appearing
The answer is hox gene.
Hox genes are responsible for an embryo's body plan. They determine different body structures - legs, vertebrae, antennae, wings, depending on groups. Mutation in hox genes is serious mutation since it affects the early stages of embryo and consequently, normal development. If a mutation occurs in the hox gene for legs growth, the legs will not develop.
Answer:
The answer should be C: mostly in the 20th century
Explanation:
Answer:
Mammals, Mollusks, Roundworms, Arthropods, Flatworms
Explanation:
