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AP Bio Chapter 13 Flashcards

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97043113hereditycontinually of biological traits from 1 generation to the next
97043114variationinherited difference among individuals of the same species
97043115geneticsscientific study of heredity
97043116geneunit of heredity; located on chromosomes; programs cells to produce specific proteins
97043117asexual reproductionall genes passed on from one parent, produces genetically identical offspring
97043118clonea group of genetically identical cells or organisms derived from a single cell or individual by some kind of asexual reproduction
97043119sexual reproduction2 parents used, both genes used from both parents, or a combination; has a unique combo of genes
97043120life cyclethe course of developmental changes in an organism from fertilized zygote to maturity when another zygote can be produced
97043121somatic cellbody cells
97043122karyotypepicture of chromosomes; somatic cell metaphase chromosomes
97043123homologous chromosomessame size and centromeres position, same gene loci
97043124sex chromosomesdetermines sex of the individual; xx or xy
97043125autosomenon sex chromosomes; different sizes and centromere location
97043126haploid cellhalf set of chromosomes; gametes
97043127fertilizationunion of 2 gametes to produce a zygote
97043128syngamyThe process of cellular union during fertilization
97043129zygotediploid cell that results from fertilization
97043130diploid cellsfull set of chromosomes; somatic cell
97043131meiosisCell division that produces reproductive cells in sexually reproducing organisms
97043132meiosis IThe first division of a two-stage process of cell division in sexually reproducing organisms that results in cells with half the chromosome number of the original cell
97043133meiosis IIthe second phase of meiosis consisting of chromatids separating, along with the two diploid cells splitting in two
97043134synapsisthe pairing of homologous chromosomes during meiosis
97043135tetradstructure containing 4 chromatids that forms during meiosis
97043136chiasmaan intersection or crossing of two tracts in the form of the letter X
97043137crossing overprocess in which homologous chromosomes exchange portions of their chromatids during meiosis

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