Previous studies on relatively small samples of individuals with trisomy 21 caused by paternally derived errors have shown that: (1) advanced paternal age is not a risk factor for chromosome 21 nondisjunction (NDJ), (2) absence of recombination, but not the location of recombination is associated with paternal NDJ and (3) there is an excess of males among live-births with paternally derived tri...

In species where males provide neither direct benefits nor paternal care, it is typically assumed that female preferences are maintained by indirect selection reflecting genetic benefits to offspring of preferred males. However, it remains unclear whether populations harbour sufficient genetic variation in fitness to support costly female preferences - a problem called the 'lek paradox'. Here, ...

OBJECTIVE Based on emerging preclinical findings suggesting that paternal smoking at conception may be a risk for ADHD in the offspring, we investigated whether a similar effect can be observed in humans. METHOD We analyzed data from an opportunistic dataset of girl probands with ( N = 140) and without ( N = 122) ADHD with available information on paternal smoking at conception. Data were ana...

The Angelman/Prader-Willi syndrome (AS/PWS) domain contains at least 8 imprinted genes regulated by a bipartite imprinting center (IC) associated with the SNRPN gene. One component of the IC, the PWS-IC, governs the paternal epigenotype and expression of paternal genes. The mechanisms by which imprinting and expression of paternal genes within the AS/PWS domain - such as MKRN3 and NDN - are reg...

Crouzon syndrome is a dominantly inherited disorder characterized by craniosynostosis and facial dysostosis, caused by mutations in the fibroblast growth factor receptor 2 (FGFR2) gene; it belongs to a class of disorders that mostly arise as de novo mutations and exhibit a near-exclusive paternal origin of mutation and elevated paternal age ("paternal age effect"). However, even if this is the ...

Studies of factor-VIll-related activities were performed in 62 obligate carriers of hemophilia A. comparing 23 daughters of hemophilic men (paternal carriers) with 39 mothers of hemophilic Sons whose fathers were normal by history (maternal carriers). Nineteen of the maternal carriers were mothers of at least 2 hemophiliacs and 20 were mothers of one. but from families whose other close male me...

Paternal influence on twinning was investigated through a study of all the state and church records of Scotland for the period 1800-2000 (nine generations) in relation to one Scottish patronymic - in total 50,000 births. All recorded twins born with the chosen patronymic were identified and their whole paternal ascent and descent on the male line were charted for twins. There were established t...

CONTEXT Advancing paternal age has been reported as a risk factor for neurodevelopmental disorders. OBJECTIVES To determine whether advanced paternal age is associated with an increased risk of BPD in the offspring and to assess if there was any difference in risk when analyzing patients with early-onset BPD separately. DESIGN A nationwide nested case-control study based on Swedish register...