Question

Developmental biology lab questions..

Chick Embryo

b. What does this suggest about the developmental of different tissue and organ system? At that point can you identify all the major body features of the bird? Is there a point where you could not identify the taxonomic group of your embryo?

Study question

3. The Lab manual discusses why chicken, fish, and amphibians are ideal organisms to study developmental biology. Using the reserse logic, discuss two developmental characteristics which would make an organism NOT an ideal candidate for study.

Answer 1

b. This suggests that some homologous tissue and organ systems exist between species such as the central nervous system. Development of different tissues and organ systems are different.

The main body features can be identified after three days i.e. after neurulation and axis formation.

There is a point where the taxonomic group is unidentifiable, at an early point during development, embryos of different species appear very similar.

3. Chicken, fish, and amphibians are ideal organisms to study developmental biology because it is easy to acquire, cheap and some eggs are largeenough for easy examination specially chicken eggs.

Using the opposite logic, if an species is rare or near to extinction or the species does not lay many eggs throughout its lifetime, obtaining its eggs for study would be very difficult and expensive.