Early Embryology
What is the process by which a single cell divides into many cells?
Cleavage
What is the larval stage of a frog called?
Tadpole
100 pts: What type of cell division produces gametes?
Meiosis
What is heterochrony?
Change in timing or rate of developmental events
Which animals share similar embryonic stages despite different adult forms?
Vertebrates (fish, frog, chicken)
What stage forms after the blastula?
Gastrula
What process turns a tadpole into a frog?
Metamorphosis
What type of cell division produces identical cells?
Mitosis
What is neoteny?
Slowing of somatic development while reproductive timing stays the same
What does the blastula stage consist of?
A hollow ball of cells
Which layer forms muscles and bones?
Mesoderm
Which structure first appears during gastrulation?
Blastopore
Which process increases cell size after cleavage?
Growth phase
What is progenesis?
Early sexual maturity resulting in smaller adult size
Which layer forms the nervous system?
Ectoderm
What is the outer most germ layer?
Ectoderm
During what stage does the neural tube form?
Neurula Stage
Which stage involves DNA replication?
S phase of interphase
What is peramorphosis?
Extended development producing exaggerated adult traits
What is the purpose of the yolk in embryos?
Nourishment
What marks the beginning of embryonic development?
Fertilization
Which event signals the end of embryonic development in frogs?
Emergence as a juvenile frog
Which checkpoint ensures DNA is correctly replicated?
G2 checkpoint
What type of heterochrony involves late onset but fast growth?
Acceleration
Which developmental process shows evolutionary relationships?
Comparative embryology