Select the set of event, in chronological order, as they occur during sexual reproduction in multi-cellular animals.
A - Fertilization, cleavage, gametogenesis, formation of the three primary germ layers, organogenesis
B - Gametogenesis, cleavage, fertilization, formation of the three primary germ layers, organogenesis
C - Gametogenesis, fertilization, cleavage, formation of the three primary germ layers, organogenesis
D - Gametogenesis, fertilization, cleavage, organogenesis, formation of the three primary germ layers
Answer: C - Gametogenesis, fertilization, cleavage, formation of the three primary germ layers, organogenesis
SEXUAL reproduction is when two parents produce offspring with unique combinations of genes from both parents.
Series of events:
1) Gametogenesis - formation of gametes
2) Fertilization - sperm and egg unite
3) Establishment of three major body axes
4) Cleavage - zygote rapidly divides to become multi-cellular
5) Formation of three germ layers
6) Organogenesis - formation of organs