Question | Answer |
trait | a characteristic that an organism can pass on to its offspring through its genes |
heredity | The passing of traits from parents to offspring |
purebred | an organism that always produces offspring with the same form of a trait as the parent. |
gene | segment of DNA that codes for a specific trait |
alleles | different forms of a gene |
recessive alleles | an allele that is masked when a dominant allele is present |
hybrid | an organism that has two different alleles for a trait; it is heterozygous |
genetics | the study of heredity |
dominant | allele whose trait always shows up in the organism |
probability | the likelihood that a particular event will occur |
punnett square | a chart that shows all the possible combinations of alleles that can result from a genetic cross |
genotype | an organism's genetic makeup |
phenotype | an organism's physical appearance |
codominance | condition in which neither two alleles is dominant or recessive |
homozygous | having two identical alleles for a trait |
heterozygous | having two different alleles for a trait |
incomplete dominance | each allele has its own degree of influence |
hetero | other |
homo | same |
di/diplo | two |
variation | any difference between individuals of the same species |
pedigree | a diagram that shows the occurrence of a genetic trait in several generations of a family |
dihybrid | hybrid involving two genes |
self-pollination | the transfer of pollen from the anther to the stigma of the same flower |
cross pollination | The transfer of pollen from an anther of the flower of one plant to a stigma of the flower of another plant |