Given that Xanthorrhoea occurs across a wide range of latitude and moisture regimes, and co-occurs with multiple species from its sister groups, environment is unlikely to be the cause of the rate shift.
By comparing the correlation in the appearance of a feature in monozygotic twin pairs to dizygotic twin pairs (see SI Fig. S1) it can be estimated how much of the variance in the feature can be attributed to genetic factors (i.e. its heritability), shared environmental factors (between twin sisters) and unique environment.
Several works point to structural functions for centromeric satellites sequences, namely its involvement in the loading of histone H3-like proteins (centromeric chromatin mark) and in the establishment of a favorable chromatin environment for sister chromatid cohesion (reviewed by Plohl et al. 2012).
Yet if his father's "fearless skepticism" was his gift to young Salman and his three sisters, a dire home environment was his curse, for Anis Rushdie was so wrathful an alcoholic that Salman's mother admitted she survived the marriage by developing a "forgettery" instead of a memory.
We lived in a working-class environment, yet my sister and I were sent to a prestigious English school with the hopes that both of us would one day end up in the US.
Thus, like in the pilE/ pilS system [ 13], recombination of tpsCs into the tpsA locus can be mediated by three different mechanisms involving uptake of DNA from the environment, recombination between sister chromosomes, or an intra-chromosomal single crossover event.
Aside from the periodic support she has received from her sister and aunt, her social environment has been of limited support, yet she accepted her role as carer and simply 'got on' with the job.
Arthur has the measles and stays in a closed environment with his little sister Mafalda.
As groups become more distinctive and better adapted to their environment, their parental and sister groups are pushed to extinction.
Why aren't the clothes sold in mini-environments corresponding to each sister?
