Human Reproduction

Once the sperm and egg cell combine, it creates a ________________.

Within 30 hours of combination, the cellundergoes _______________ and divides quickly

The embryo of dividing cells implants itself in the ________________________________, where it will continue to grow into a child

What happens when mitosis and meiosis fail?

When mitosis goes wrongWhat happens when DNA can be damaged or changed by a variety of factors such as…

___________________

UV radiation (wear sunscreen!!!)

Chemical exposure

__________________

__________________

When the DNA is damaged, the cell is ____________________________.What happens when What happens when

Science 9

Biology 6Name:Date:Block:

As the cell begins to mutate and malfunction, it has a

possibility of _______________________

The cell’s natural self destruct button no longer works and

the cell divides rapidly, __________________________

Once the tumor is large enough, pieces of cancerous cells can break off and be carried to other parts of the body through the _________________________

Fasciation

The word fasciation comes from the Latin word meaning “band/stripe”

This mutation/damage is in the

___________________________ of plant which are

responsible for their __________________

What causes this to happen?

bacteria,

viruses,

physical damage_________________

_________________

When meiosis goes wrong

In human cells, there are 46 chromosomes organised in 23 pairs.

Human gametes should have 23 chromosomes.

However, during meiosis, it is possible for the sperm or egg cell to have

______________________________________.

When this happens, the gametes usually do not survive, but if they do survive and are fertilized, the resulting human will have a

_______________________

Which phase of meiosis fails to create these dysfunctional gametes?

What happens to individuals with Trisomy 21?

_______________________________________

What happens to individuals with Trisomy 13?

What happens to individuals with Sex chromosome trisomy?

___________________________________________________