How is an individuals sex determined? Aristotle claimed that sex was determined
by the heat of the male partner during intercourse. He also counseled elderly men
to conceive in the summer if they wished to have male heirs.
Aristotles Theory: The female w
Chapter 18: Birth Defects, Endocrine Disruptors, and Cancer
Developmental Diseases: Stochastic (random) events; Genetic Mechanisms:
Genetic Syndromes; Environmental Mechanisms: Teratogenesis; Cancer
Stochastic (random) events: If you have two X chromoso
Gametogenesis in Mammals: What are the differences between spermatogenesis
and oogenesis in mammals? Sexual dimorphism in mammalian meiosis:
Meiosis initiated once in a finite population of Meiosis initiated continuou
Secondary Sex Determination: How is secondary sex determination controlled?
Secondary sex determination is predominantly controlled by gonadal steroid
Male: Androgen (testosterone or dyhydroestosterone) and androgen receptor
Wnt inhibitor (Dick
The Saga of the Germ Line
The cycle of life: Fertilized eggs embryos adults fertilized eggs (repeat). The
different stages are: fertilization, cleavage, gastrulation, organogenesis,
metamorphosis, and gametogenesis.
What is the general process of gameto
What are the mechanisms of alcohol as a teratogen? Peroxide radicals-induced cell death.
Cancer as a Disease of Development: What are the roles of cell environment in tumor
development? Teratocarcinoma is a tumor of germ cells or stem cells. Whether the c
Developmental Bio 4
Multilimbed Pacific tree frog (Hyla regilla), the result of infestation of the
tadpole-stage developing limb buds by trematode cysts. The parasitic cysts
apparently split the developing limb buds in several placed, resulting in extra
Notes development Bio! #1
The two layers of the lateral plate mesoderm are the somatic LPM and the
splanchnic LPM. The somatic layer is on top and the splanchnic is on the bottom.
The somatic LPM + ectoderm somatopleure
The splanchnic LPM + endoderm spla
Endoderm: Into what portions will the gut tube be divided during endodermal
folding in early human development? The portions of the gut tube are foregut,
midgut, and hindgut. What organs are formed by budding out from the gut tube?
The organs formed are l
Developmental Bio 2
The Formation of Blood Vessels: Do blood vessels sprout from the heart? No. The
blood vessels form independently of the heart. What does it mean that that
formation of blood vessels is constrained by evolution? Mammals still extend