To minimize maternal tissue contamination and increase the confidence of imprinted gene identification, different approaches were carried out in the two studies.
All of these aspects increase the cost of the imprint smear method, making it undoubtedly more expensive than skin scraping.
For instance, Ludwig et al. (2005) reported an increased prevalence of imprinting defects in patients with Angelman syndrome born to subfertile couples and suggested that superovulation, rather than ICSI, may further increase the risk of an imprinting defect in the child.
Ms. Godoff said she plans to increase the number of books the imprint publishes, going from 42 titles each year to at least 62. "I knew that I could grow the Penguin Press by 50 percent, at least," she said.
The sexual antagonism and maternal offspring coadaptation theories view genomic imprinting as a mechanism to modify the resemblance of an individual to its two parents, with imprinting evolving to increase the probability of expressing the fitter of the two alleles at a locus.
Genes with segregating polymorphism have alleles with varying effects on male and female fitness, and, in the sexual antagonism theory, imprinting exists to increase the probability that the fitter allele is expressed in each sex (or in the sex under stronger selection).
The emergence and evolution of genomic imprinting is a puzzle to geneticists since the functional haploidy caused by imprinting may increase the risk of being exposed to a deleterious mutation, unlike the case of Mendelian inheritance where there is always a "backup" compensation from the other allele.
Methods based on molecular imprinting can increase the recognition capabilities of such systems.
In the unloading process, the adhesion increased as the imprint depth increased.
If a marker shows additivity but not imprinting, on the other hand, it would be expected that i=0 and hence applying an imprinting model on an additive marker would not increase the variance.
