section 5b inherited diseases
Download
Skip this Video
Download Presentation
Section 5b – inherited diseases

Loading in 2 Seconds...

play fullscreen
1 / 8

Section 5b – inherited diseases - PowerPoint PPT Presentation


  • 128 Views
  • Uploaded on

Section 5b – inherited diseases. National 4/5 – Multicellular Organisms. What are inherited diseases?. Diseases caused by faulty genetic material that are passed on to future generations. They are sometimes called genetic disorders. Many inherited diseases are caused by mutations in DNA .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Section 5b – inherited diseases' - edena


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
section 5b inherited diseases

Section 5b – inherited diseases

National 4/5 – Multicellular Organisms

what are inherited diseases
What are inherited diseases?

Diseases caused by faulty genetic material that are passed on to future generations. They are sometimes called genetic disorders.

Many inherited diseases are caused by mutations in DNA

- resulting in faulty alleles that are not properly expressed.

Mutations can be spontaneous or caused by mutagens

e.g. radiation and certain chemicals.

There are over 4,000 known inherited diseases

- BUT the alleles involved are only known for 25% of them.

learning outcomes
Learning Outcomes
  • By the end of this section I will be able to:
  • - identify the different types of genetic disorders
  • - give named examples for each type
  • - explain how people can be classed as carriers for some inherited diseases
what types of inherited disease exist
What types of inherited disease exist?
  • Single-gene diseasesThese are caused by mutations in single genes.

E.g. Huntington’s disease, cystic fibrosis and sickle cell anaemia

  • Multifactorial diseasesThese are caused by mutations in several genes combined with environmental factors.

E.g. heart disease, Alzheimer’s, diabetes and cancer.

  • Chromosomal diseasesThese are caused by an abnormal number or structure of chromosomes.

E.g. Down’s syndrome and Klinefelter’s syndrome.

what are carriers
What are carriers?

Like ‘normal’ alleles, faulty alleles can be dominant or recessive.

Some people can have a copy of a faulty allele for an inherited disease, but not have the disease themselves.

These people are called carriers.

Carriers can potentially pass the disease on to their children.

treating inherited diseases
Treating inherited diseases

Many inherited diseases are serious and even fatal, but some allow people to lead relatively normal lives with appropriate treatment.

However, most inherited diseases cannot yet be cured.

Curing an inherited disease involves replacing faulty genes with normal genes.

This is called gene therapy, but it is a very complex and relatively new technique, and has yet to be widely successful.

your task
Your task
  • You will now research a chosen inherited disease.
  • You will be required to include the following:
  • - explain the symptoms caused by this condition
  • - explain how this condition is inherited
  • - describe ways in which this condition is currently treated
ad