Inheretance And Variation Flashcards

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1
Q

What is heterozygous

A

Someone that carry’s the allele for the disease, so their children are at risk of getting it

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2
Q

How is a organism genetically engineered?

A

The dna that you want to insert is cut out with a restriction enzyme

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3
Q

What are mutations?

A

A change to the base sequence in dna .

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4
Q

What can variation with in a species be caused by?

A

Environmental variation

Genetic variation

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5
Q

What are sex linked genetic disorders caused by?

A

Faulty alleles located on sex chromosomes

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6
Q

Which base bonds with C in dna?

A

G

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7
Q

Which base bonds with A in dna?

A

T

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8
Q

What is the name for the base A in dna?

A

Adenine

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9
Q

What is the name for the base T in dna?

A

Thymine

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10
Q

What is the name for the base C in dna?

A

Cytosine

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11
Q

What is the name for the base G in dna?

A

Guanine

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12
Q

What is the shape of DNA

A

Double helix

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13
Q

Define genotype

A

An organisms genetic composition

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14
Q

What is phenotype

A

An organisms observable characteristics due to interactions of the genotype and environment ( which can modify the phenotype)

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15
Q

Define homozygous

A

Having two identical alleles of a gene eg. GG or gg

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16
Q

What is a mono hybrid inheritance?

A

The inheritance of a single gene

17
Q

What causes genetic variation in species?

A

Spontaneous mutations

Sexual reproduction

18
Q

What is a non communicable disease?

What is it caused by

A

A disease that can not be spread

Caused by lifestyle, environmental conditions, genetic mutations ect

19
Q

What is a communicable disease?

A

A disease that can be spread between person to person

Caused by a pathogen

20
Q

Give some examples of non communicable diseases

A
  • cancer
  • diabetes
  • cardiovascular disease
21
Q

What is a risk factor?

A

A variable associated with a greater chance of developing a disease or infection

22
Q

Outline factors that can effect the risk of developing a non communicable disease

A

Lifestyle factors eg. Diet, exercise, alcohol, smoking
Environmental factors eg. Pollution exposure
Genetics eg.alleles that increase the risk of cancer

23
Q

Define health

A

A state of complete mental and social wellbeing

24
Q

Define disease

A

A disorder of the body or mind that negatively effects a individuals health