Traits Flashcards
The scientific study of heredity.
Genetics
The passage of genetic instructions from one generation to the next generation.
Heredity
Gregor Mendel
An Austrian monk,
born in 1822, who carried out work with various
plants that contributed to the understanding of
genetics
The different forms of a gene.
Alleles
A sequence of DNA that determines a trait and is passed from parent to offspring.
Gene
A specific characteristic that an organism can pass to its offspring through its genes.
Trait
An allele whose trait always shows up in the organism when the allele is present.
Dominant Allele
An allele that is hidden whenever the dominant allele is present.
Recessive Allele
An organism’s physical appearance, or visible traits.
Phenotype
An organism’s genetic makeup, or allele combinations.
Genotype
A chart that shows all the possible combinations of alleles that can result from a genetic cross.
Punnett Square
Homozygous Dominant
AA
Heterozygous
Aa
Homozygous Recessive
aa
An offspring of many generations that have the same form of a trait.
Purebred