N4 U2 Key Area 4 Genetic Information

A section of DNA that codes for one characteristic?

• gene

• chromosome

• allele

• base

Different versions of a gene?

• gene

• chromosome

• allele

• base

An allele that is represented by a capital letter is always....

• dominant

• recessive

An allele that is represented by a lower case letter is always....

• dominant

• recessive

Eye colour can have two alleles, Brown (B) and Blue (b).

If a person has Bb as their genotype what colour eyes will they have?

• blue

• brown

• a mixture of blue and brown

Eye colour can have two alleles, Brown (B) and Blue (b).

If a person has bb as their genotype what colour eyes will they have?

• blue

• brown

• a mixture of blue and brown

Eye colour can have two alleles, Brown (B) and Blue (b).

If a person has BB as their genotype what colour eyes will they have?

• blue

• brown

• a mixture of blue and brown

In the punnet square what information is missing from box 1?

• Nn

• N

• NN

• nn

In the punnet square what information is missing from box 2?

• Nn

• N

• NN

• nn

In the punnet square what information is missing from box 3?

• Nn

• N

• NN

• nn