Inheritance key terms Flashcards
Genotype
The genetic constitution of an organism (the alleles it has for a gene)
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
Heterzygous
A pair of homologous chromosomes carrying two 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 in the phenotype
Co-dominant
Both alleles are equally dominant and expressed in the phenotype
Multiple alleles
More than two alleles for a single gene
Sex-linkage
A gene who’s locus is on the X chromosome
Autosomal linkage
Genes that are located on the same chromosome (not the sex-chromosomes)
Epistasis
When one gene modifies or masks the expression of a different gene at a different locus
Monohybrid
Genetic inheritance cross of a characteristics determined by one gene
Dihyrbid
Genetic inheritance cross for a characteristic determined by two genes
