3.1.2 Inherited disorders Flashcards

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1
Q

What is a genetically inherited disorder?

A

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

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2
Q

Give 3 examples of genetically inherited disorders.

A

Cystic Fibrosis

Haemophilia

Polydactyly

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3
Q

Describe the symptoms of cystic fibrosis

A

Lost of thick sticky mucus produced

Difficulty breathing

Difficulty absorbing food

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4
Q

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

A

Physiotherapy to remove mucus

Antibiotic to kill bacterial infections

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5
Q

Cystic fibrosis is caused by a __________ allele

A

recessive

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6
Q

A person will only have cystic fibrosis if they inherit…

A

2 copies of the recessive allele.

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7
Q

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

A

No but they will be a carrier.

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8
Q

What is meant by a ‘carrier’ of cystic fibrosis?

A

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

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9
Q

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

CC

A

CC = 2 dominant alleles so would not have cystic fibrosis

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10
Q

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

cc

A

cc = 2 recessive allele so would have cystic fibrosis

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11
Q

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

Cc

A

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

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12
Q

What is polydactyly?

A

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

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13
Q

Polydactyly is caused by a _________ allele

A

dominant allele

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14
Q
A
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