ZOO 3050 Lecture Notes - Lecture 6: Adult Stem Cell, Oogenesis, Gonadal Ridge
Document Summary
Sperm or egg: pgc bipotential, genotype, environmental sex determination (esd, changes sex ratio of population based on temperature, statistically can change mating opportunities bias % of male: female, entirely dependent on environmental temperature. In mammals there is also the gonad: immediate environment (genital ridge) that determines the sex of the differentiation of the pgcs, these are specific cells that express certain cells that ultimately lead to differentiation in the. If there is no signal then you automatically default to female. Sex ratio is changing as a function of temperature for different types of species. Different species have an optimum dependent on the environment they live in. If this optimum changes for various reasons then you can shift the distributions. Important because they produce testosterone: male reproductive hormone, release of this hormone is largely important for the differentiation of these cells types, hormones released by cells can signal over long distances, or cell to cell interactions.