science Flashcards
the passing of genetic traits from parents to off springs
heredity
the trait observed in the first generation when parents that have diffrent traits that are bread
dominant triat
a trait that reappears in the second generation after disappearing in the traits are bred
recessive trait
one set of insructions for an inherited trait
gene
on of the alteritive forms of genes that converns a charitirtics
alleles
an organism’s apperence or other detectable characteristic
phenotype
the entire genetic makeup of an organism
genotype
the likely hood that a possible future event will occur in any given instanceof the event
probability
a procces in cell division during wich the number of chromosomes decreased to half the original number by two divisions of the nucleas, wich results in the production of sex cell
meiosis
one of the pair of chromosomes that determans the sex of an indivtual
sex chromosomes
a diagram that shows the occurrence of a genetic trait in several generations of a family
pedigee
a self replicateing maltial that is present in nearly all living arginisms as the main constitution of chromodomes
DNA
a structular sudmit of nucleic accid, the heridty-controlling components of all living cells
nucleoside
the action or proccess of mutating
mutation
ribonucleic acid, a nucleic acid present in all living cells. Its principal role is to act as a messenger carrying instructions from DNA for controlling the synthesis of proteins, although in some viruses RNA rather than DNA carries the genetic information.
RNA
