Genetics

Question 1

Name the structure in the cell that contains DNA

Answer 1

The nucleus

Question 2

What is the term used to describe the number of chromosomes in an egg or sperm cell?

Answer 2

Haploid

Question 3

Why do you filter the mixture when extracting DNA?

Answer 3

To remove insoluble material

Question 4

What is the role of ethanol in DNA extraction?

Answer 4

To precipitate the DNA

Question 5

Describe the structure of DNA

Answer 5

a double helix

Question 6

Explain how two parents with a dominant
phenotype can produce offspring
expressing a recessive characteristic.

Answer 6

Both parents must be heterozygous for the recessive allele. The offspring inherits the recessive allele from each parent.

Question 7

Describe the causes of variation in a

population

Answer 7

Genetic variation and environmental variation.

Question 8

Explain how a gene mutation can produce

a different protein

Answer 8

Change in a base that causes a shape in an amino acid

Question 9

Name the base pairs in DNA

Answer 9

Thymine with Adenine, Cytosine with Guanine

Question 10

Name the bonds joining the two strands of

a DNA molecule together

Answer 10

Weak hydrogen bonds