All Flashcards
What are the differences between codominance and incomplete dominance?
Codominance: Both alleles are fully expressed. | Incomplete dominance: Results in a blended phenotype.
What are the differences between Mendelian and non-Mendelian inheritance?
Mendelian: Traits are determined by dominant and recessive alleles with simple inheritance patterns. | Non-Mendelian: Traits are determined by multiple alleles, codominance, incomplete dominance, or sex-linked genes.
Define multiple alleles.
The existence of more than two alleles for a particular gene within a population.
Define codominance.
A form of inheritance wherein both alleles for a trait are equally expressed, resulting in a phenotype that shows both traits.
Define incomplete dominance.
A form of inheritance wherein the heterozygous condition produces an intermediate phenotype that is a blend of the two homozygous phenotypes.
Define non-Mendelian inheritance.
Any pattern of inheritance in which traits do not segregate in accordance with Mendel's laws.
Define allele.
A variant form of a gene.
What is the effect of having the IA and IB alleles for blood type?
Expression of both A and B antigens on red blood cells, resulting in AB blood type.
What is the effect of having the 'i' allele for blood type?
No A or B antigens are produced, resulting in O blood type.
What is the effect of multiple alleles?
Increased phenotypic diversity within a population for a given trait.