GENES

13 cards·by janice.hg

Heredity

passing of physical characteristics from parents to offspring

Trait

a characteristic that an organism can pass to its offspring by genes

Gene

the set of information that controls a trait; segment of DNA on a chromosome that codes for a specific trait

Allele

different forms of gene; represented by capital and lower case letters

Recessive Allele

an allele that is hidden when dominant allele is present (always lower case letter)

Dominant Allele

an allele whose trait always shows up in an organism when the allele is present (always upper case letter)

Genetics

the scientific study of heredity

Homozygous (purebred)

having two identical alleles for a trait

Heterozygous (Hybrid)

an organism that has two different alleles for a trait

Phenotype

an organism's physical appearance or visible traits

Genotype

an organism's genetic makeup, or allele combinations "letters"

Variation

any difference between individuals of the same species

Punnett Square

a chart that shows all the possible combinations of alleles that can result from a genetic cross