Parental drift
نویسنده
چکیده
" Alarm over the rapid progress of embryo research was fuelled by another dramatic development last night. Scientists revealed that they have created 'virgin birth' embryos for the first time in Britain. " Both stories artfully blended competent accounts of actual and potential advances in reproductive technology with scary language and condemnation, magnified by repetition and typography, from opponents. " British scientists have been given the go-ahead to create a human embryo with two genetic mothers, " began medical correspondent Jenny Hope. " The Human Fertilisation and Embryology Authority (HFEA) reversed an earlier ban on the research project at Newcastle University. The programme will involve transferring some genetic material from the fertilised egg of one woman into an egg from another. The aim is to avoid mothers passing a range of incurable genetic diseases to their unborn babies. " However, this calm opening was immediately followed not by an explanation of those likely benefits but by strident voices of opposition. Critics had branded the decision " a biotechnological nightmare " and another step towards a " chilling world " of reproductive cloning. " This decision is utterly unethical, abhorrent and contrary to public opinion, " said Matthew O'Grady of the charity LIFE. " The HFEA is relentlessly imposing its libertarian agenda on the people of this country against their wishes. The Government must act to disband it immediately. " The following day saw similar treatment for a talk by Paul de Sousa of the Roslin Institute near Edinburgh, given at the British Association's Festival of Science in Dublin. He had reported success in efforts to trigger parthenogenesis in human eggs, six parthenotes having been grown for five days to reach the blastocyst stage. After two sentences outlining the procedure, Julie Wheldon and Fiona MacRae asserted that it raised the " spectre " of being used to clone a baby. " Campaigners said scientists had crossed a moral line and were experimenting with the future of mankind, " they wrote. " We have gone from an embryo with three parents to one with only one parent, " said Josephine Quintaville from something called Comment on Reproductive Ethics. " These scientists are playing with the future of human News focus Parental drift Mediawatch: Bernard Dixon reports on the local press reaction to two British developments in human reproductive technology and finds that journalists' needs for drama and colour are quite distinct from …
منابع مشابه
Maximum-likelihood estimation of admixture proportions from genetic data.
For an admixed population, an important question is how much genetic contribution comes from each parental population. Several methods have been developed to estimate such admixture proportions, using data on genetic markers sampled from parental and admixed populations. In this study, I propose a likelihood method to estimate jointly the admixture proportions, the genetic drift that occurred t...
متن کاملMolecular basis of organ-specific selection of viral variants during chronic infection.
Viral variants of different phenotypes are present in the central nervous system (CNS) and lymphoid tissues of carrier mice infected at birth with the Armstrong strain of lymphocytic choriomeningitis virus. The CNS isolates are similar to the parental virus and cause acute infections in adult mice, whereas the lymphoid isolates cause chronic infections associated with suppressed T-cell response...
متن کاملA threefold genetic allee effect: population size affects cross-compatibility, inbreeding depression and drift load in the self-incompatible Ranunculus reptans.
A decline in population size can lead to the loss of allelic variation, increased inbreeding, and the accumulation of genetic load through drift. We estimated the fitness consequences of these processes in offspring of controlled within-population crosses from 13 populations of the self-incompatible, clonal plant Ranunculus reptans. We used allozyme allelic richness as a proxy for long-term pop...
متن کاملGyroscope Random Drift Modeling, using Neural Networks, Fuzzy Neural and Traditional Time- series Methods
In this paper statistical and time series models are used for determining the random drift of a dynamically Tuned Gyroscope (DTG). This drift is compensated with optimal predictive transfer function. Also nonlinear neural-network and fuzzy-neural models are investigated for prediction and compensation of the random drift. Finally the different models are compared together and their advantages a...
متن کاملRisk of schizophrenia in relation to parental origin and genome-wide divergence.
BACKGROUND Second-generation immigrants have an increased risk of schizophrenia, a finding that still lacks a satisfactory explanation. Various operational definitions of second-generation immigrants have been used, including foreign parental country of birth. However, with increasing global migration, it is not clear that parental country of birth necessarily is informative with regard to ethn...
متن کاملMammalian Small Nucleolar RNAs Are Mobile Genetic Elements
Small nucleolar RNAs (snoRNAs) of the H/ACA box and C/D box categories guide the pseudouridylation and the 2'-O-ribose methylation of ribosomal RNAs by forming short duplexes with their target. Similarly, small Cajal body-specific RNAs (scaRNAs) guide modifications of spliceosomal RNAs. The vast majority of vertebrate sno/scaRNAs are located in introns of genes transcribed by RNA polymerase II ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Current Biology
دوره 15 شماره
صفحات -
تاریخ انتشار 2005