Genes1
When one trait conceals the presence of another trait for the same characteristic.
Mendel's Law of Dominance
the study of heredity
Genetics
The process by which physical and biological characteristics are transmitted from the parent (or parents) to the offspring
Inheritance
a chart that shows a trait in a family and how it is inherited
Pedigrees
Traits that always show in a person even if only one gene of the pair is inherited for the trait
Dominant Traits
a chart that shows the possible combination of alleles due to fertilization
Punnett Squares
when neither of two alleles is dominant over the other, they don't blend but appear together at the the same time (like A and B blood type alleles).
Co-dominant traits
Describes a trait that covers over, or dominates, another form of that trait.
Dominant
traits that typically do not show in a person unless both genes for the trait are inherited
Recessive Traits
Different forms of a gene
Allele
DNA segments that serve as the key functional units in hereditary transmission.
Genes
An allele that is masked when a dominant allele is present
Recessive
An organism that has two identical alleles for a trait
Homozygous
Mendelian law stating that two alleles for each trait separate during meiosis
Law of Segregation
Physical expressions of genetic trait
Phenotypes
the production of offspring
Reproduction
An organism's physical appearance, or visible traits.
Phenotype
An organism that has two different alleles for a trait
Heterozygous
the law that states that genes separate independently of one another in meiosis
Law of Independent Assortment
genetic makeup of an organism
Genotypes
Those "nonbiological" factors that are involved in a person's surroundings such as the nature of the person's parents, the person's friends, and the person's behavioral choices.
Environmental Factors
Offspring of crosses between parents with different traits
Hybrid
the offspring of many generations that have the same traits
Purebred