BS 182H Lecture 19: BS 182H_Lecture 19
17 Mar 2016
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Document Summary
Fsh (follicle stimulating hormone) stimulates a follicle to grow and induces primary oocyte to complete meiosis i and start meiosis ii: differs from spermatogenesis, cytoplasm monopolized by oocytes and ovum, continuous, ovulation, humans = spontaneous ovulators. Concealed/cryptic ovulation: men can"t know when to mate with women (humans, evolved to keep men faithful (?, women dress best when ready to mate, near ovulation, women dress to impress, hormone levels predict attractiveness of women, women"s facial attractiveness = directly related to their oestrogen levels, science says lap dancers send signals", ovulatory cycle even has an effect on tip earnings. Development: within 11 hours of fertilization, oocyte extrudes 2nd haploid polar body, about 30 hours after fertilization, zygote begins to cleave into two cells called blastomeres, zygote starts dividing with intervals of 30 hours, when there are about 16 cells, zygote = morula (mulberry shaped blastocyst, leaves fallopian tube and enters uterine cavity.
