Cooing and babbling are early stages of speech development. As babies get older (often around 9 months), they begin to string sounds together, incorporate the different tones of speech, and say words like mama and dada (without really understanding what those words mean).
The map distance between two genes, measured in centimorgans or map units, equals the percentage recombination frequency between the two genes--the likelihood of offspring with copies of those genes on the same chromosome that come from different parents.ave. dna image by Allyson Ricketts from Fotolia.com. The concept of map distance in a genotype refers to where genes are located on a chromosome but does not refer to physical distance; rather, map distance refers to the tendency for a crossover to occur between genes.
All linkage map distances are calculated as the percentage recombination between two loci. This is reflected in the percentage of recombinant offspring. A. If two genes are completely linked, all of the offspring will be parental (have the same linkage as the parents); there will be no recombinant offspring.hus the linkage map distance between the two genes would be zero LMU (Linkage Map Units). B. If the genes are on separate chromosomes (or are far enough apart that crossing over between them occurs in virtually all meioses), half of the offspring will be recombinant, the other half parental.