Genetics and Inheritance

Question 1

Is there variation between all species

Answer 1

Yes

Question 2

What can cause variation

Answer 2

Environment and genes

Question 3

What two things can variation be (HINT: graph)

Answer 3

Discrete or continuous

Question 4

What traits are discrete and what graph would you draw

Answer 4

Monogenic, bar chart

Question 5

What traits are continuous and what graph would you draw

Answer 5

Polygenic, histogram

Question 6

Give an example of a monogenic and polygenic trait

Answer 6

Monogenic- eye colour
Polygenic- height

Question 7

What are chromosomes

Answer 7

Found in the nucleus and made of a chemical called DNA

Question 8

What is a gene

Answer 8

A short section of DNA or chromosome

Question 9

What is an allele

Answer 9

Different versions of the same gene are called allele

Question 10

What are dominant allele

Answer 10

They are always expressed
They can be seen on the physical appearance of the organism
Only one parent needs to give the allele to the child

Question 11

What are recessive alleles

Answer 11

They are only expressed when two are inherited- one from each parent