How can we help?

You can also find more resources in our Help Center.

Genetics II Terms

STUDY
PLAY
heredity
passing on characteristics from parent
genetics
study of heredity
Traits
Inherited characteristics
Genome
All genes in an organism
Alleles
Different forms of the same gene, get 2 alleles for each trait (mom & dad) tall/short
Homozygous
Two alleles of the same form (2 dominants and 2 recessives)
Heterozygous
Different alleles (one dominant and one recessive)
Recessive
form of gene only expressed in homozygous state, masked by dominant gene
Dominant
Form of a gene that always shows even if recessive allele is present
Phenotype
Organism's physical appearance caused by expression of genes
Genotype
Type of gene alleles present in organism's genome (Two letters for each trait
Test cross
Genotypically homozygous recessive organism crossed with a phenotypically dominant organism, used to determine the genotype of an unknown