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Not always: They would be no more likely to look alike than any other siblings. ...Read more
What is the rate of success of modified ericsson method for gender selection. I want exact perventage for boy gender. Am lost with different answers?
No definitive answer: There is no definitive answer, and thus why you are "lost with differing answers." ericsson methods can never fully extrapolate 100% sperm for male or female, ...The layers of gender-selected sperm are of higher concentrations but not pure. This lack of purity explains the approximate 30% chance of gender selection failure of the ericsson method. ...Read more
Reports of cranio-: Phagus-type conjoined twins' sharing sensations exist, depending on what areas of brain tissue are shared or separated by only a thin septum. ...Read more
Risk factors for CVD: High blood pressure, high cholesterol, excess weight, physical inactivity, smoking, diabetes, excessive alcohol consumption, illegal drug use and stress. Unpreventable risks include: previous heart attack, family member with heart disease, increasing age, gender and race. ...Read more
Hair growth: Hair follows a specific growth cycle with three distinct and concurrent phases: anagen, catagen, and telogen phases. Each phase has specific characteristics that determine the length of the hair. All three phases occur simultaneously; one strand of hair may be in the anagen phase, while another is in the telogen phase. ...Read more
Does certain strains of HIV produce the same exact symptoms in people at the same time? No matter when infected?
No: The penetrance of a mutation defines the risk of developing the disease in those that carry a particular mutation. Women with brca mutations have lifetime risks estimated between 40-80%; men's risks are much less-studied but are probably in the range of 10% or less. ...Read moreSee 1 more doctor answer
Do identical twins have the same sexual orientation? If not, does that mean sexual orientation is not encoded in DNA?
Twin DNA: Although identical twins have the same DNA, the DNA molecule has the potential for mutation, and changing the gene's expression creating differences depending upon the gene(s) involved. Gender identity is thought to be determined by genetics as well as other factors, although an actual variation or determining factors have not been identified. ...Read moreSee 1 more doctor answer
Unpredictable: Over 3 decades of watching this play out, i find no predictable pattern. In some families dad's genes seem dominant & some mom's.Some have bits of both & some seem unrelated. ...Read more