key terms for topic 2

Question 1

gene

Answer 1

a sequence of bases on a dna molecule that codes for a protein

Question 2

allele

Answer 2

a different version of a gene

Question 3

genotype

Answer 3

the allele a person has such as BB for eye colour

Question 4

phenotype

Answer 4

the characteristics displayed by an organism

Question 5

dominant

Answer 5

an allele whose characteristic appears in the phenotype if only one is present (only one of the dominant alleles is needed for it to be expressed)

Question 6

recessive

Answer 6

two copies of the need to be present for the allele to be expressed in the phenotype

Question 7

incomplete dominance

Answer 7

when the trait from a dominant allele is not completely shown over the trait produced by the recessive allele so both alleles influence the phenotype

Question 8

homozygote

Answer 8

an organism that carries two coppies of the same allele for a certain characteristic

Question 9

heterozygote

Answer 9

an organism carries two different alleles for a certain characteristic