Heredity Vocab Flashcards
Heredity
The passing og genetic traits from parent of offspring.
Dominant Trait
The trait observed in the first generation when parents that have different traits are breg.
Recessive Trait
A trait that reappears in the second generation after disappearing in the first generation when parents with different traits are bred.
Genes
One set of instructions for an inherited trait.
Allele
One of the alternative forms of a gene that governs a characteristic, such as hair color.
Phenotype
An organism’s appearance or other detectable characteristic.
Genotype
The entire genetic makeup of an organism; also the comination of genes for one or more specific traits.
Probability
The likelihood that a possible future event will occur in any given instance of the event.
Meiosis
A process in cell division during which the number of chromosomes decreases to half the orginal number by two divisons of the nuclues, which results in the production of sex cells.
Sex Chromosomes
One of the pair of chromosomes that determine the sex of an individual.
Pedigree
A diagram that shows the occurrence of a genetic trait in several generations of a family.
DNA
Deoxyribonucleic acid, a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live.
Nucleotide
In a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base.
Mutation
A change in the nucleotide-base sequence of gene or DNA molecule.
