Inheritance Flashcards
Gentoype
Genetic charateristic
Phenotype
Physical characteristic
Homozygous
Pair of homologous chromosomes with same alleles for a gene
Hetreozygous
Pair of homologous chromosomes with 2 different alleles for a gene
Recessive
Only expressed without dominant allele
Dominant
Always expressed
Co dominant
Both alleles expressed
Multiple alleles
More than 2 alleles for 1 gene
Sex linkage
Gene that’s locus is on the X chromosome
Autosomal linkage
Genes located on the same chromosome
Epistasis
One gene affects the expression of another gene
Monohybrid
Cross determined by 1 gene
Dihybrid
Cross determined by 2 genes
Crossing over
Occurs in homologous chromosomes
Swap alleles located on the same locus
Autosomal linkage
2 genes found on the same chromosome
Genes are linked and inherited together
Example: all gametes must either be RY or ry
So dihybrid of RrYy x RrYy goes from 9:3:3:1 to 3:1