Sex Chromosomes Flashcards
1
Q
Females sex chromosomes are identical.
What chromosomes are they?
A
X chromosomes
2
Q
In males they are different. What two chromosomes are they?
A
X and Y chromosomes
3
Q
Sex of an individual is determined by a gene on the Y chromosomes called …
A
Sex-determining region Y
4
Q
If the sex-determining region Y gene isn’t present what sex will the embryo be?
A
Female
5
Q
If the sex-determining region Y gene is present what sex will the embryo be?
A
Male
6
Q
What hormone does the testes start producing six weeks after fertilisation?
A
Androgen
7
Q
When do the make reproductive organs begin to grow?
A
When specialised receptors in the developing embryo detect the androgen.
