3.1.2 Inherited disorders Flashcards Preview

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Flashcards in 3.1.2 Inherited disorders Deck (14)
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1

What is a genetically inherited disorder?

A condition passed from parents to their offspring in their genes.

2

Give 3 examples of genetically inherited disorders.

Cystic Fibrosis

Haemophilia

Polydactyly

3

Describe the symptoms of cystic fibrosis

Lost of thick sticky mucus produced

Difficulty breathing

Difficulty absorbing food

4

Cystic fibrosis cannot be cured. How can the symptoms be eased?

Physiotherapy to remove mucus

Antibiotic to kill bacterial infections

5

Cystic fibrosis is caused by a __________ allele

recessive

6

A person will only have cystic fibrosis if they inherit...

2 copies of the recessive allele.

7

If a person inherits a dominant cystic fibrosis allele and a recessive cystic fibrosis will they have the disorder?

No but they will be a carrier.

8

What is meant by a 'carrier' of cystic fibrosis?

A person who does not have cystic fibrosis but carries one copy of the recessive allele so could pass it on to their children.

9

Would the following have cystic fibrosis, not have cystic fibrosis or be a carrier of cystic fibrosis?

CC

CC = 2 dominant alleles so would not have cystic fibrosis

10

Would the following have cystic fibrosis, not have cystic fibrosis or be a carrier of cystic fibrosis?

cc

cc = 2 recessive allele so would have cystic fibrosis

11

Would the following have cystic fibrosis, not have cystic fibrosis or be a carrier of cystic fibrosis?

Cc

Cc = 1 dominant and 1 recessive allele so no cystic fibrosis but would be a carrier.

12

What is polydactyly?

A disorder that results in a child being born with extra digits on their hands or feet.

13

Polydactyly is caused by a _________ allele

dominant allele

14