This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: If G and R are linked, then whenever you have a G, you have an R. Any gray, purple offspring (G-rr) would result from crossing over because a Gr gamete is needed. Suppose out of 100 offspring, you got 46 gray, red, 46 black purple, 4 gray purple and 4 black red. Eight percent of the offspring resulted from crossing over. These offspring are recombinant . Crossing Over Crossing over is more likely to occur between genes that are far apart. The farther apart genes are, the greater the probability that crossing over will occur between them. In the example above, we had 8% crossing over. The percent of recombination (crossing over) can beused as a measure of how far apart genes are. 1% crossing over = 1 map unit....
View Full Document
- Fall '10
- Biology, Genetic linkage, Chromosomal crossover, Eye color