Lecture 1
Nature and Scope of Developmental Biology
Вариантов на этом колесе: 24
- study of embryonic and other developmental processes.
- slow process of progressive change in the organism
- 2 kinds of development
- development of individual
- formation of gametes
- union of egg cell and sperm
- for mitotic division
- cellular movement - it involves the 3 germ layers (ectoderm, endoderm, and mesoderm)
- formation of tissue and organ
- direct observation and description of embryological development
- similarity and difference in development of animals
- Examines the cellular control of development
- Developmental stages are studied by biochemical and physiological techniques.
- concerned with the study of malformations
- tranquilizer, causing baby without limb
- absence of limb
- problems of conception and contraception
- generation of cellular diversity (production of different cell type)
- reproductive cells contained preformed adult individuals -development simply means growth
- 2 groups of theories of development
- thought the same way about ovum and stimulated only in the seminal fluid.
- contended that sperm contained the new individual in miniature and only nourished in the ovum.
- successive generation of new structures from pre-existing one.
- organism is derived from substances present in the egg, which differentiates into adult structure during embryonic development.