B13.9 Inherited disorders

Question 1

What is polydactyl?

Answer 1

Having an extra finger/toe

It is caused by a dominant allele and can be inherited

Question 2

What is Cystic fibrosis?

Answer 2

Genetic disorder that prevents the movement of certain substances from one side to the other - as a result makes mucus very thick

Question 3

What are the problems with cystic fibrosis?

Answer 3

Can cause infertility

Can affect lungs and cause respiratory problems

Question 4

What is cystic fibrosis caused by?

Answer 4

A recessive allele

Question 5

What are carriers?

Answer 5

People who carry the recessive cystic fibrosis allele because it gives them no symptoms

Question 6

How can genetic disorders be cured?

Answer 6

Genetic engineering that can allow them to replace faulty alleles with healthy ones
But not have cured anyone yet

Question 7

Why both of your parents must be carriers of the alleles cystic fibrosis before you can inherit the disease?

Answer 7

Cystic fibrosis caused by recessive allele,
which must be inherited from both parents for child to have disease. If both parents had the disease themselves they would almost certainly be infertile.
so parents must be carriers (heterozygotes).