F1 generation - The offspring resulting from the cross between individuals with a homozygous recessive and a homozygous dominant genotype, F2 generation - The offspring resulting from a cross between two F1 individuals, Test cross - A genetic cross in which an organism showing the dominant characteristic is crossed with a homozygous recessive organism, Sex chromosomes - The chromosomes that determine sex - in humans these are the X and Y chromosome, Sex-linked gene - A gene found on a region of a sex chromosome that is not present on the other sex chromosome, Carrier - An individual that possesses a particular allele as a single copy whose effect is masked by a dominant allele - the characteristic is not displayed by may be passed to offspring, Epistasis - The interaction of two genes at different loci; one gene may affect the expression of the other, Autosomal linkage - The presence of two genes on the same autosome - so that they tend to be inherited together and do not assort independently, Parental type - Offspring that show the same combinations of characteristics as their parents, Recombinant - Offspring that show different combinations of characteristics to their parents, Chi-squared test - A statistical test that is used to determine whether differences between observed and expected results are significant, Crossing over - The exchange of alleles between non-sister chromatids of homologous chromosomes during meiosis I,

AL Advanced Inheritance

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