Revision Yr 11 Mocks-DNA And The Geonome

Question 1

What is DNA

Answer 1

A polymer mole made up of a double stranded double helix molecule

Question 2

What does DNA stand for

Answer 2

Deoxyribuneclic acid

Question 3

What are the coding regions called in a chromosomes

Answer 3

Genes

Question 4

How many pairs of chromosomes does a normal person have

Answer 4

2 times 23

Question 5

What is a chromosome

Answer 5

A length of DNA

Question 6

What to genes code for

Answer 6

Any characteristic

Question 7

What are alleles

Answer 7

A different form of a gene e.g eye colour could have 
Brown allele 
Blue allele
Green allele 
Etc

Question 8

What are the two types of allele

Answer 8

Dominant and recessive

Question 9

When is a dominant allele expressed

Answer 9

Whenever they are present eg
Xx
XX

Question 10

When are recessive alleles present

Answer 10

If there are two recessive alleles eg

xx

Question 11

What does homozygous mean

Answer 11

Two alleles the same eg
XX
xx

Question 12

What does heterozygous mean

Answer 12

If two alleles are different eg

Xx

Question 13

What does the genome code for

Answer 13

The entire genetic material for that organism

Question 14

Why would scientists study the geonome

Answer 14

• Search for diseases linked to certain alleles

- Mean they are able to tread inherited disorders