Inheretance And Variation

Question 1

What is heterozygous

Answer 1

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

Question 2

How is a organism genetically engineered?

Answer 2

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

Question 3

What are mutations?

Answer 3

A change to the base sequence in dna .

Question 4

What can variation with in a species be caused by?

Answer 4

Environmental variation

Genetic variation

Question 5

What are sex linked genetic disorders caused by?

Answer 5

Faulty alleles located on sex chromosomes

Question 6

Which base bonds with C in dna?

Answer 6

G

Question 7

Which base bonds with A in dna?

Answer 7

T

Question 8

What is the name for the base A in dna?

Answer 8

Adenine

Question 9

What is the name for the base T in dna?

Answer 9

Thymine

Question 10

What is the name for the base C in dna?

Answer 10

Cytosine

Question 11

What is the name for the base G in dna?

Answer 11

Guanine

Question 12

What is the shape of DNA

Answer 12

Double helix

Question 13

Define genotype

Answer 13

An organisms genetic composition

Question 14

What is phenotype

Answer 14

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

Question 15

Define homozygous

Answer 15

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

Question 16

What is a mono hybrid inheritance?

Answer 16

The inheritance of a single gene

Question 17

What causes genetic variation in species?

Answer 17

Spontaneous mutations

Sexual reproduction

Question 18

What is a non communicable disease?

What is it caused by

Answer 18

A disease that can not be spread

Caused by lifestyle, environmental conditions, genetic mutations ect

Question 19

What is a communicable disease?

Answer 19

A disease that can be spread between person to person

Caused by a pathogen

Question 20

Give some examples of non communicable diseases

Answer 20

• cancer
• diabetes
• cardiovascular disease

Question 21

What is a risk factor?

Answer 21

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

Question 22

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

Answer 22

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

Question 23

Define health

Answer 23

A state of complete mental and social wellbeing

Question 24

Define disease

Answer 24

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