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Lecture 14

PSYC 100 Lecture Notes - Lecture 14: Pubic Hair, Sex Organ, Fetus

Course Code
PSYC 100
Pukall Caroline F

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PSYCH 100 Week 14
Tuesday, January 12, 2016
Developmental Psychology:
Physical & Lifespan Development
200-300 years ago, the term “sex’ was used in a very limited manner
ostate of being male or female (you “were” male or female)
oyou couldn’t “have” sex in those days
starting about 100 years ago, “sex” began to be used more broadly
ocould now “have” it
ocan refer to many/all aspects of sexual activity
onow, different terms used to refer to different aspects of being “male” and
Biological Sex
femaleness or maleness as indicated by chromosomes, reproductive organs, hormones
and anatomy
at birth, anatomy rules the decision as to whether the infant is a “boy” or a “girl”
obut this decision is actually more complex than one might think, especially when
considering sex determination in the animal kingdom
1. Chromosomal (genetic) sex
oHuman cells typically contain 23 pairs of chromosomes
oChromosomes house DNA
oOne pair of the 23 is the sex chromosome pair
oAn egg donates an X chromosome to this pair and the sperm donates either an X
or Y chromosome
XX (“female” chromosome)
XY (“male” chromosome)
2. Reproductive organs (that produce reproductive cells, the gonads: testes and ovaries)
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