Biology

Question 1

gene

Answer 1

part of DNA molecule that carries the code for one protein

Question 2

Allele

Answer 2

different form of gene. e.g. The gene for hair colour has alleles for brown, black, red and blonde hair.

Question 3

Phenotype

Answer 3

What the characteristic actually looks like. e.g. brown hair.

Question 4

Genotype

Answer 4

The alleles that are present, written as letters e.g. BB.

Question 5

Dominant

Answer 5

An allele that will always be seen in the phenotype if it is present.

Question 6

Recessive

Answer 6

An allele which will only be seen in phenotype if there is no dominant allele present.

Question 7

Homozygous

Answer 7

Only one type of allele is present in the genotype. e.g. BB or bb.

Question 8

Heterozygous

Answer 8

Both dominant and recessive alleles are present in the genotype. e.g. Bb.

Question 9

P

Answer 9

The parents in a genetic cross.

Question 10

F1

Answer 10

The first generation of offspring in a genetic cross.

Question 11

F2

Answer 11

The second generation of offspring in a genetic cross