heredity Flashcards
heredity
the passing of genetic traits from parent to offspring
Dominant Trait
the trait observed in the first generation when parents that have different traits are bred.
Recessive Trait
a trait that reappears in the second generation after disappearing in the first generation when parents with diffrent traits are bred
Genes
one set of instructions for an inherited trait.
Alleles
one of the alternative forms of a gene that governs a characteristic
Phenotype
an organism’s appearance or other detectable characteristic
Genotype
the entire genetic makeup of an organism also the combination of genes for one or more specific
Probability
the likelihood that a possible future event will occur in any given instance of the event.
Meiosis
a process in cell divison during which the number of chromosomes.
Sex chromosomes
one of the pair of chromosomes that dermine the sex of an idividual.
Pedigree
a diagram that shows the occurrence of a genetic trait in several generations
DNA
Deoxyribonucleic acid a molecule that is present in all living cells
Nucleotide
in a nucleic-acid chain, a subunit that consists of a sugar .
mutations
a change in the nucleotide base sequence of a gene or DNA molecule.
RNA
Ribonucleic acid , a molecue that is present in all living cells
