Question

The correct sequence of embryonic development is

• A. Blastula-morula-zygote-gastrula-embryo
• B. Zygote-blastula-morula-gastrula-embryo
• C. Zygote-morula-blastula-gastrula-embryo
• D. Gastrula-morula-zygote-blastula-embryo

Answer 1

Answer: (C)

Zygote-morula-blastula-gastrula-embryo

• The embryonic development takes through several developmental stages.
• The sperm and ovum fuse to form the zygote.
• The zygote undergoes mitotic cleavage to form morula which is a 16 celled stage known as the morula which further divides to form blastula which is 128 celled stage.
• The blastula differentiates into gastrula which is cup-shaped and has three germ layer cells which further forms an embryo and undergo organogenesis.
• So, the correct answer is option C.