Genetics Terms

particular version of a characteristic seen in an individual is described as

• genotype

• phenotype

• alleles

• variation

the alleles an organism has for a characteristic

• genotype

• phenotype

• alleles

• variation

different versions of a gene that contain different instructions for a characteristic

• dominant

• genotype

• alleles

• recessive

will mask the effect of another allele

• dominant

• recessive

• gene

• discrete

two alleles an organism inherits are identical

• heterozygous

• dominant

• homozygous

• recessive

two alleles an organism inherits are different

• heterozygous

• dominant

• homozygous

• recessive

parents in a genetic cross

• P

• F

• F1

• F2

second generation in a genetic cross

• P

• F

• F1

• F2

grid that shows the possible combinations of alleles that can result at fertilisation.

• pocket square

• phenotype square

• punnet square

• parent square

characteristics that fall into separate categories

• recessive variation

• dominant variation

• continuous variation

• discrete variation