Genetics Flashcards
Genotype
Genetic makeup of an organism
Phenotype
Physical characteristics
Allele
Different versions of the same gene
Mutation
A change in a gene
Dominant allele
The allele that shows (A)
Recessive allele
Must have 2 to be visible (a)
Homozygous
AA or aa
Heterozygous
Aa
Monohybrid
Cross between 1 differing gene
Punnett Square
Diagram to predict genotypes
Test Cross
An experimental cross to find the unknown genotype
Law of Independent Assortment
All genes move independently
Incomplete Dominance
More than 1 capital letter, more than two phenotypes
BLEND
Codominance
More than 1 capital letter
More than 2 phenotypes
Both phenotypes show
Multiple alleles
More than two alleles
Hemophilia
Blood does not clot properly, thin
Epistasis
A gene being dependent upon other genes to show
Gamete
Reproductive cells
Somatic cells
Any cell which is not a reproductive cell
Hybrid
Offspring of two different species of an organism
Carrier
An individual who carries a gene and can pass it on, but does not show it
Autosomal Disorder
Mutations on the autosomes
Ex: Cystic Fibrosis
Pedigree
Record of “affected” people in a family