How does a single fertilized egg cell develop into so
many different types of specialized cells?

They both cannot produce all cells. Multipotent- limited to replacing cells in the tissue where they are found.

Explanation:

the answer to you question is   jet streams

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands