Recitation 5

• Recombination is the formation of new genetic combinations by the exchange of parts between homologs
• Linkage is when two loci recombine in less than 50% of gametes
• Chi-square test is a statistical method for testing the fit between observed and expected results
• Chiasma is a structure formed at the spot where crossing over occurs between homologs
• Locus is the relative chromosomal location of a gene
• Coefficient of coincidence is the ratio of observed double crossovers to expected double crossovers
• Interference is one crossover along a chromosome makes a second nearby crossover less likey
• First-division segregation is when the two alleles of a gene are segregated into different cells at the first meiotic division
• Mosaic is an individual composed of cells with different genotypes