Inheritance Key terms Flashcards
Genotype
The genetic constitution of an organism
Phenotype
The expression of the genes and its interaction with the environment
Homozygous
A pair of homologous chromosomes carrying the same alleles for a single gene
Heterozygous
A pair of homologous chromosomes carrying different alleles for a single gene
Recessive allele
An allele only expressed if no dominant allele is present
Dominant allele
An allele that will always be expressed if in the phenotype
Codominant
Both alleles are equally dominant and expressed in the phenotype
Multiple alleles
More than two alleles for a single gene
Sex - Linkage
A gene whose locus in on the X chromosome
Autosomal Linkage
Genes that are located on the same chromosome (not the sex chromosome)
Epistasis
When one gene modifies or masks the expression of a different gene at a different locus
Monohybrid
Genetic inheritance cross of a characteristic determined by one gene
Dihybrid
Genetic inheritance cross for a characteristic determined by two genes
