Multicellular organisms definitions Flashcards
Allele
Different forms of the same gene
Homozygous / true breeding
An individual with two copies of the same allele present.
Heterozygous
An individual with two different alleles present
Phenotype
The physical characteristics of an organism
Dominant
An allele that always shows its effects as a phenotype and masks the presence of the other form
Recessive
An allele that is masked by the dominant allele i.e. it will only show its effect / show in the phenotype if both alleles are present
Genotype
The set of genes (alleles) possessed by an individual
Phenotype ratio
The ratio of the appearance of the offspring produced in a genetic cross
Genotype ratio
The ratio of genotypes of the offspring produced in a genetic cross