The role of chromosomes and hormones in sex and gender Flashcards
What are chromosomes made from?
DNA
Genes are short sections of what?
DNA
Genes are short sections of DNA that determine…
the characteristics of a living thing
How many chromosomes are in the human body?
46
There are __ chromosomes in the human body that are arranged into __ pairs
46, 23
How are the 46 chromosomes in the human body arrange?
Into 23 pairs
Which pair of chromosomes determines biological sex?
The last
What is the chromosomal structure for females?
XX
What is the chromosomal structure for males?
XY
Why are the chromosomal structures for biological sex named XX and XY?
Because of how they appear when viewed under a microscope
All normal egg cells produced by a human ovary have an _ chromosome
X
Which chromosome is carried by sperm?
Either an X or Y
What is a baby’s sex determined by?
The sperm that fertilises the egg cell
The baby will be female if the fertilising sperm carries an _ chromosome
X
The baby will be male if the fertilising sperm carries a _ chromosome
Y
What gene does the Y chromosome carry?
A gene called the ‘sex-determining region Y’ or ‘SRY’ for short
What is SRY short for?
Sex-determining region Y
What does the SRY gene cause?
Testes to develop in an XY embryo that produce androgens - male sex hormones
Androgens
Male sex hormones
If testes develop in an XY embryo, what do these produce?
Androgens
True/False: All babies follow the same basic pattern of XX or XY chromosomes
False, e.g. in cases such as Turners
What initially determine a person’s sex?
Chromosomes
Although chromosomes initially determine a person’s sex, most gender development actually comes about through the influence of…
hormones