Science Flashcards
heredity
the passing of genetic traits from parent to offspring
dominate trait
the trait observed in the first generation when parents that have different traits are bred
recessive trait
a trait that appears in the second generation after dis spearing in the first generation when parents with different traits are bred
gene
one set of instructions fro an inherited trait
allele
one of the alternative forms of a gene that governs a chars tic such as hair color
phenotype
an organisms appearance or other detectable chars tic
genotype
the entire genetic makeup of an organism
proballity
the likelihood that a possible future event will occur in any given instance of the event
homologous chromes
chromosomes that have that sequence of genes and the same structure
meiosis
a process in cell division during which the number of chromes decreases to half
sex chrosome
one of the pairs of chromosome that determine the sex of an individual
pedigree
a diagram that shows the occurrence of a genetic trait in several generations of a family