Reproduction Flashcards
Internal fertilisation eg. Human, horse and butterfly
Eggs are produced in small numbers
Usually used by land animals, water not available for sperm to swim
Better chance of surviving because protected environment
External fertilisation (3 plus.) eg. Fish and fish
Lots of eggs
Water is available for the sperm to swim
Risk, egg and sperm can be eaten by aquatic
What’s another word for sex cells
Male
Female
Gamete
Sperm
Egg
The first cell of a new living thing
A zygote produced at fertalisation
What does the cytoplasm contain in an egg cell
Yolk (food for developing embryo)
Development of fertilised egg
Zygote
Embryo
Foetus
Baby
Three labels for sperm cell
Nucleus, contains information which helps control the new baby cell
Head, contains chemicals that open the eggs membrane
Tail (flagellum), to push the sperm towards the egg
List 3 ways the sperm cell is adapted for fertalisation
It has a tail which pushes it towards the egg
The head has chemicals to open the egg cell
Nucleus contains information which will help control the new babie s cells
How is the egg cell designed for reproduction
Yolk is food so the embryo can grow for
Layer of jelly, protects the egg
Nucleus, contains half the genetic information (from the mother)
Make reproductive system labels
Penis Testes Glandes Sperm duct Urethra Scrotum Sperm cells Semen
Female reproductive system
Fallopian tubes or oviduct Uterus Vagina Cervix Ovary
What joins in the cells during fertalisation
The nucleus from the egg and the nucleus from the sperm
What happens to the cells immediately after fertalisation
They divide into two four eight etc. forming a ball which passes down the oviduct/Fallopian tube into the womb/ uterus and implants itself into the lining
