Mendel and the Gene Idea Flashcards
Whats is incomplete dominance?
heterozygous shows an intermediate phenotype
Ex: Red (R) and White (r) give pink
What is Codominance?
Full expression of both alleles
Ex: Blood type -> AB
What is Pleiotrophy
A single gene has multiple phenotypic effects
Ex: A gene in tigers causes both white coats and crossed eyes
What is Epistasis?
One gene alters the expression of another gene
Ex: One set of genes for hair colour and another set of genes for whether or not the colour become deposited
Polygenic Inheritance?
A phenotypic trait governed by two or more gene combos
Ex
What is an Autosomal recessive disorder?
A disorder is caused by the inheritance of two recessive alleles?
Ex: Albinism needs (aa)
What is a Dominant Autosomal Disorder?
expressed even if only one disease allele is present
