We ought not to risk adding to the number of one-parent families by tempting men to walk out before the threshold qualifying period, say two years, in order to avoid financial liability, when all recent studies show that Britain's children are the unhappiest and poorest in Europe.
The structure of the family is also changing in that some couples choose not to marry legally and instead elect to have their children out of wedlock; many of these informal relationships tend to be of short duration, and this as well as the rise in levels of divorce has led to a rapid increase in the number of one-parent households.
From 2004 to 2008, the number of one-parent families receiving Temporary Assistance for Needy Families -- the post-reform version of welfare -- dropped from about 1.1 million to fewer than 800,000, according to data from the Department of Health and Human Services.
That is, some allopolyploids may start out with far more rDNA copies of one parent than the other, simply because the diploid parents differ in copy number.
The number of children with one parent with bipolar disorder is expected to be similar.
The organisation found a discrepancy of 240,000 between the Office for National Statistics' figure on the number of lone-parent households in England and Wales, and the number of people in receipt of one-parent benefits.
The number of families headed by one parent has risen considerably since 1999 from 2.5 million to almost 3 million last year.
And what of one-parent families?
Overall, the ISAG recommendations can be debated, however, currently, they are based on (1) number of SNPs, that are used (a minimum of 90 for one parent and 85 for two parents) and (2) number of conflicting genotypes.
According to the Pew Research Center, rising numbers of American children live with one parent or with two parents who both work.
This points to the single greatest reason for the higher number of Black children who live in one parent households.
