Note that the posterior probability of the monozygous
carrier genotype (x = 11) being almost zero for each individual is not shown here.
concordance rates for focal epilepsy (0.34) and febrile epilepsy (0.60) were also much higher than anticipated, he said.
Initial zygosity studies indicated a 99.9% probability that they were monozygous
. Subsequent studies done on skin samples, however, indicated dizygosity; these findings were confirmed upon additional genetic analysis.
One such example (summarized in Tippet, 1984) is a case of a monozygous
pair of male twins identical in chromosome markers, HLA, isozymes an d serum proteins, both XX/XY in the blood, but differing in other organs sampled such as skin and secretory tissues.
Skeletal muscle fibres and muscle enzyme activities in monozygous
and dizygous twins of both sexes.
Individuals with at least one diabetic parent have a much higher incidence of NIDDM than those of similar body habitus who do not have a diabetic parent. Several studies of twins suggest that NIDDM is highly concordant among monozygous
and less concordant among dizygous twins, indicating that genetic factors play a major role in the etiology of NIDDM.
"You should treat all clones like you would treat all monozygous
[identical] twins or triplets,".concludes Dr.
As the 2 boys grew older, however, their almost indistinguishable appearance strongly suggested that they might be identical, or monozygous
Two studies comparing monozygous
and dizygous twins may be cited.
One study of 57 monozygous
and 49 dizygous twin pairs reared apart and 90 nontwin siblings showed that impulsivity as assessed by a personality questionnaire was significantly correlated in the monozygous
twins but not in the others.
However, in such cases the risks could not be quantified because the database did not differentiate between monozygous
and dizygous twin pairs.