Evidence for recombination Additional material from part of the Y chromosome Discontinuit car Bar Parental(9) chromosomes cart Ba No crossing-over Meiosis Crossing-over car Ba ar car Bar Ba Ba car Bar car Bart Parental Chromosomes Recombinant transmitted to ca Bar progeny(o) ca Bar Parental Recombinant
2 3 Synapsis Chiasmata become visible Istes af crossing-over) Anaphase I lois I Haploid products
9 ry/ry: tkv*/tkv ory/ry: tkv /tk 1(all identical) ry/ry, tkv/tkv+ Test cross ry/ry, tkv/tkv+x Ory/ry;tkv/tkv Test cross 531 ry /ry; tkv/tkv Parental531+515×100=50% progeny 515 ry+/ry; tkv /tkv classes 2090 540/y; kv " L Recombinant=540+504×100=50% 504 ry /ry: tkv/tkv Classes 2090 Total 2090 2al bs/al oal* bst/al* b F1(all identical) a/ bs/al*bs Test cross Pal bs/al+bs*x Cal bs/albs 497 al bs /al bs Parental= 497+460 x 100=51.8% 460 al+ bs/al bs- classes 1848 465 a/ bs/al bs 426 al+ bs/al bs cla Recombinant=465+426×100=482% 1848 otal 1848
Three point cross
Three Point Cross