Mendelian inheritance.

Question 1

Does dominant autosomal gene affect males or females?

Answer 1

Both

Question 2

What is the chance of inheriting a dominant autosomal gene?

Answer 2

50%

Question 3

What type of gene causes most disorders.

Answer 3

Recessive autosomal.

Question 4

Why are males usually affected more by X- linked recessive genes.

Answer 4

They only have one X chromosome - do not have the chance of gaining another X that may be dominant over the recessive.

Question 5

Can males transmit X-linked disorders down to sons?

Answer 5

Nope.

Question 6

If a male has a X-linked dominant gene, will their daughter be affected?

Answer 6

Yes.

Question 7

If there is a recessive gene, and a carrier father and a carrier mother, what would be the likelihood of their four children being carriers, affected or unaffected?

Answer 7

2 children = carriers
1 child = affected
1 child = unaffected.

Question 8

How many people carry cystic fibrosis in the UK?

Answer 8

1/25

Question 9

How many people have cystic fibrosis in the UK?

Answer 9

1/2500

Question 10

Is cystic fibrosis caused by a recessive gene or a dominant gene?

Answer 10

recessive

Question 11

Is achondroplasia affected by a dominant gene or a recessive gene?

Answer 11

dominant . (btw - its a type of dwarfism)

Question 12

Is hunting tons disease caused by a dominant or a recessive gene?

Answer 12

Dominant. (huxngtingtons disease damages nerve cells in the brain)

Question 13

What gene is Duchenne muscular dystrophy caused by?

Answer 13

X-linked gene (this gradually causes muscle to weaken - leaving someone more disabled.