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Biology: Chapter 11 - Introduction to Genetics
Terms in this set (33)
sequence of DNA that codes for a protein and thus determines a trait
a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
one of two identical "sister" parts of a duplicated chromosome
Different forms of a gene
A characteristic that an organism can pass on to its offspring through its genes.
sex cell; an egg or a sperm cell
body cell (somatic cell)
any cell of a living organism other than the reproductive cells.
one factor cross
a cross in which the inheritance of only one trait is followed
two factor cross
Crosses in which the inheritance of two different traits are followed
An allele whose trait always shows up in the organism when the allele is present.
recessive allele/ trait
An allele that is masked when a dominant allele is present
An organism that has two identical alleles for a trait
An organism that has two different alleles for a trait
An organism's genetic makeup, or allele combinations.
An organism's physical appearance, or visible traits.
A condition in which neither of two alleles of a gene is dominant or recessive.
three or more alleles of the same gene
trait controlled by two or more genes
Situation in which one allele is not completely dominant over another allele
(genetics) an organism or cell having two sets of chromosomes or twice the haploid number
A cell containing only one set of chromosomes (n).
part of eukaryotic cell division during which the cell nucleus divides
Cell division that produces reproductive cells in sexually reproducing organisms
exchange of genetic material between homologous chromosomes during prophase I of meiosis
structure containing 4 chromatids that forms during meiosis
Parental generation, the first two individuals that mate in a genetic cross
the first generation of offspring obtained from an experimental cross of two organisms
offspring of the F1 generation
when pollen from the male part of a flower pollinates the female part of the same flower
pollination between flowers and different plants
Pair of chromosomes that are the same size, same appearance and same genes.
Identical copies of a chromosome; full sets of these are created during the S subphase of interphase.
likelihood that a particular event will occur
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