Gender Flashcards
Difference between sex and gender
Sex= -The Genotype (chromosomes) E.g. XY, XX.
- Testosterone, Oestrogen (progesterone)
- The Phenotype (penis/testes, vagina)
Gender= -Sex role behaviours
- Sex/gender identity
- Cognitive abilities
- Attitudes and perceptions
Sex can be defined in terms of 3 kinds of physical differences between males and females
1) Fertilisation= Whether egg (which carries an X chromosome) was fertilised by a sperm carrying an X or a Y chromosome
- XX= girl, XY= boy
2) Gonads= Males have testes and females have ovaries
3) Hormones= Males produce androgens(most important one being testosterone) and females produce oestrogen and progesterone
How many pairs of chromosomes do humans have
46 chromosomes
23 pairs
Biological sex is determined on what pair of chromosomes
The last one, 23rd pair of chromosomes
If the pairing is XX it’s what gender
If the pairing is XY it’s what gender
XX = Female
XY = Male
What chromosome does a normal egg produce
A normal egg produced by an ovary have an X chromosome
What’s a baby’s sex determined by
What sperm cell fertilises the egg
E.g. boy if sperm is carrying a Y chromosome and a girl if it’s carrying an X chromosome
The Y chromosome carries what gene
The SRY gene
What does the SRY gene do
- SRY gene causes the testes to develop in an XY embryo
- These produce Androgens: Male sex hormones
What do Androgens cause the embryo to do
Androgens cause the embryo to become a Male; without them the embryo becomes a female
What’s the difference in role of chromosomes and hormones
- Chromosomes initially determine a persons sex
- Most gender development is governed by hormones. They’re produced prenatally and during puberty
What do hormones affect
They influence development of genitalia and/or affect the development of the brain, both of which influence gender behaviour
What are the 3 main different hormones
- Testosterone
- Oestrogen
- Oxytocin
Describe testosterone
A male hormone, which develops the Male sex organs and is linked with behaviours such as increases aggression
Describe oestrogen
A female hormone which develops female sexual characteristics and is linked with emotional changes during menstrual cycle (e.g. Increased irritability)
Describe oxytocin
- A hormone which facilitates bonding
- Released In large doses after childbirth, making the mother feel a strong emotional connection to their baby.
- Produced In lower quantities in men, but in equal amounts in both sexes during sexual intercourse
Male hormones are collectively known as….
Androgens
Testosterone is linked to what type of behaviour in both genders, but more so in men (in humans and animals)
Aggression
De poll et al study on testosterone
Method, results, conclusion
- Female rats injected with testosterone
- Became more physical and sexually aggressive
- Supports role of gender development because testosterone causes aggressive behaviour. Greater in men so can account for difference in gender behaviours. Also Valid as environment is controlled (rats born into labs, can control experiences) which eliminates environmental factors in terms of aggression
What other explanations can you provide for why males are more aggressive
- Job occupations
What’s Androgen insensitivity syndrome
Where a genetic Male is not exposed to enough testosterone in the womb, and can therefore look physically female at birth
When do males who suffer from androgen insensitivity syndrome start physically looking like males
During puberty when hormonal changes occur (more testosterone)
Study for androgen insensitivity syndrome
Batista boys
How does the case of the Batista Boys support the role of hormones in gender development
- At puberty, testosterone changes their physical appearance
- Gender identity
- Testosterone changed their phenotype