Inheritance Flashcards
Complete dominance
Presence of a dominant allele masking the presence of the other recessive allele. The dominant allele determines the expression of the heterozygous genotype
Incomplete Dominance
Neither allele dominates the other. The phenotype of the heterozygous genotype appears as an intermediate or blended form of both alleles
Co Dominance
Both alleles contribute to the expression of the heterozygous genotype
Lethal Alleles
When a mutation results in an allele that produces a non-functional version of an essential allele, resulting in a death of an organism
Multiple Alleles
Having three or more alleles existing for a gene
Monohybrid Inheritance
Inheritance of one trait controlled by one gene that can have two or more different alleles
Dihybrid Inheritance
Inheritance of two traits controlled by two genes that are either linked or unlinked
Linked Genes
Genes on the same chromosome, altering the inheritance pattern because they are in the same chromosome and are inherited together and not separated during meiosis
Crossing 2 homozygotes (YYRR and yyrr)
100% of the offsprings will be heterozygous (YyRr) which is F1 generation
Crossing 2 heterozygotes (2 from F1 gen)
Produces 9:3:3:1 phenotypic ratio