Why do you think that Huntington’s disease is still around (1 in 20.000 people) whereas other dominantly inherited diseases are not that common?
Slide 19 - Question ouverte
A man who gets Huntington’s disease at the age of 40 had two children with a woman who doesn’t have it. He had himself tested and he turns out to be a heterozygote. What is the chance both his children will get it? Explain by using Punnett squares.
Slide 20 - Question ouverte
Slide 21 - Diapositive
Slide 22 - Diapositive
A man who is a carrier of cystic fibrosis wants to have a child with a woman whose parents are carriers of cystic fibrosis. She doesn’t know if she is a carrier. What is the chance that the child will get cystic fibrosis? Is it advisable to get herself tested?
Slide 23 - Question ouverte
Learning Objectives
You can explain what a mutation is.
You can explain how a disease can be inherited from one generation to the next.
Slide 24 - Diapositive
questions...
How many sex chromosomes are there to be found in a gamete?
What are the chances of having a baby girl of baby boy?
Who is ‘responsible’ for the gender of a baby: the mother, the father or both?