4,5 human fertilisation Flashcards
(4 cards)
1
Q
fertilisation
A
when the nucleus of the sperm fuses with the nucleus of the egg
2
Q
zygote
A
a fertilised egg cell
3
Q
identical twins
A
twins that have developed from the same zygote, identical copies of each other
4
Q
fraternal twins
A
twins that have developed from 2 seperate zygotes
