Inherited disorders

Question 1

What is Cycstic fibrosis ?

Answer 1

It is a genetic disorder of the cell membranes. It results in the body producing a lot of tho m sticky mucus in the air passages and in the pancreas

Question 2

What is cystic fibrosis caused by ?

Answer 2

A recessive allele

Question 3

What is polydactyly caused by ?

Answer 3

A dominant allele

Question 4

What is polydactyls ?

Answer 4

A genetic disorder where a baby’s born with extra. fingers or toes. It usually cause any other roble a so isn’t life threatening

Question 5

What does it mean if something is a recessive allele ?

Answer 5

Carried by about 1 person in 25. Because it’s recessive, people with only one cohort of the allele won’t have the disorder (carriers)

For a child to have the disorder, both parents must be either carriers or have the disorder themselves

Question 6

What does it mean if something is a dominant allele ?

Answer 6

Can be inherited if jus one parent carries the defect

There is a 50% chance of a child having the disorder if one parent has one D allele

Question 7

How. an embryos be screened for genetic disorders ?

Answer 7

• Before being implanted it is possible to remove a cell from each embryo and analyse the genes (genetic disorders can be detected)

-It is also possible to get DNA from an embryo in the womb and test for disorders

Question 8

What are the arguments against embryonic screening ?

Answer 8

• Implies that people with
  genetic problems are undesirable - increase prejudice
• May become a point when wants to screen their embryos and pick the desirable one
• Screening is expensive

Question 9

What are the arguments for embryonic screening ?

Answer 9

• Held to stop
  people suffering
• Treating disorders costs the Government a lot of money
• There are laws to stop it going too far. At the moment parents cannot even select the sec of their baby