ANT100Y1 Lecture Notes - Lecture 9: Colistin, Y Chromosome, Parthenogenesis
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ANT100Y1 Full Course Notes
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Document Summary
Human sexual variation, medical anthropology & forensic anthropology. Just as morphological variation in humans, we have a fantastic variety of gender and sexual identities and biologies, respectively. Biological sex is a function of anatomy. Old days: external boys parts or external girl parts. Newer days: xy (male) or xx (female), trisomy (xxx, xxy, xyy), pentasomy (xxxx, xxyy, xxxxx, xxxxy, xyyyy) New days: all kinds of external and internal parts. Biological sex is incredibly variable in plants and animals; don"t just look at ours. Unisexual species: only girls , reproducing through parthenogenesis (non sperm reproduction) Seen in hundreds of insect and animal species, but not in humans until done so in a lab by accident. Sequential hermaphroditism: individual changes sex at some point in its life (male>female, female>male) nemo fish! Develop into males first and when they mature, they become females. If dominant female is removed from group, largest and most dominant male becomes female.
