determing the sex of offspring at fertilisation Flashcards
1
Q
what is a persons sex determined by?
A
a whole pair of chromosomes
2
Q
what happens when a female makes her eggs during meiosis?
A
she splits all her chromosome pairs
3
Q
each egg cell receives what chromosome?
A
an X chromosome
4
Q
what happens when a male produces sperm?
A
he also splits his chromosome pairs
5
Q
what chromosomes does the sperm cell receive?
A
half of the sperm cell receives an X chromosome
the other half receives a Y chromosome
6
Q
what is the sex of the embryo determined by?
A
the sperm that forms it- each sperm is either a Y carrying or an X carrying- only one of these sperm will win the race to the egg and fertilise it- this is the sperm that determines the sex
