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Bill and Brian are identical twin brothers Bill has developed bipolar disorder Brian is concerned about his chances of developing bipolar disorder He was told it was only about a forty percent Chan?
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∙ 13y ago
concord
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∙ 13y ago
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Would two brothers have the simIlar dna?
It is very unlikely that two brothers would have babies with the same DNA. That could only happen if identical twin brothers married identical twin sisters, and even then the mixing of DNA during reproduction makes this an extremely unlikely outcome.
Can brothers and sisters share the same DNA?
No, unless they are Identical Twins. Normal siblings will on average share 50 percent of their genetic material, since they get half of their chromosomes from their mother and half from their father.
Do studies of identical twins show that there is a relationship between genetics and sexuality?
Yes. Absolutely. In the Kallman study in 1952, Kallman found that of the 37 identical twins classified they all not only had the same sexuality but were similar in their sex practices. The next large study of note (and the most recent) was performed in 1991 by Bailey and Pillard. They decided to look for homosexuals to apply to a study and asked them if they had an identical twin, fraternal twin, or an adoptive brother. Then they asked for the sexuality of the brothers of the homosexual men. The scientists believe that if genetics is a factor, we should see a much higher amount of homosexual behavior in identical twins than in fraternal twins who only share as many genes as normal siblings. Also, if genetics play a part in sexuality, then there should still be a higher concurrence in fraternal twins than in adoptive brothers who share no genes. 52% (more than half) of the identical twins of a homosexuals were also homosexual. As the average amount of people that are homosexual is around 10%, this indicates that genetics play a very large role in sexuality. 22% of the fraternal twins of homosexuals were also homosexual. Again, this is in comparison to the 10% of the population that is normally homosexual, so even with brothers that are not identical genetics make it twice as likely that a person will be homosexual if they have a homosexual sibling. Finally, with adoptive brothers that shared the same home, only 11% were homosexual. When no genetics are involved, the rate of homosexuality dropped down to where it would be expected to be - the national average of 10%.
Are identical twins the same in their genes?
Nope. Research has shown that DNA in twins is different, especially in copy number varitations, which refers to when a gene exists in multiple copies, or a set of letters in the DNA is actually missing. These variations are suspected to lead to increased defense against some infections, or vulnerability to others. http://www.nytimes.com/2008/03/11/health/11real.htmlTheir genes are very similar.Because the two embryos are the result of a single egg/sperm combination, they have the same genetic origins. They have the same DNA. however, they don't have the same finger printsAlmost! While the sequence begins identical, epigenetics (environmental type factors) appear to cause them to change over time.
Why are identical twins so close?
Bear in mind that no two individuals are exactly the same. However, seeing that indentical twins result from the same fertilized egg with the same sperm, they are essentially clones of each other.
Why don't brothers and sisters look identical to each other?
Brothers and sisters are not identical because they have different combinations of alleles.
Would two brothers have the simIlar dna?
It is very unlikely that two brothers would have babies with the same DNA. That could only happen if identical twin brothers married identical twin sisters, and even then the mixing of DNA during reproduction makes this an extremely unlikely outcome.
If identical brothers impregnated identical sisters would the babies be identical cousins?
No, because not all genes are selected from the parents. Identical brothers/sisters have exactly the same genes...the egg split just after genes were selected. They will sure look similar, though.
Bill and Brian are identical twin brothers?
concordance
Is farternal the same as identical?
if you mean "fraternal" this means that 2 brothers are twins but do not look alike, identical means 2 twin brothers lokk exactly the same.
Why do brothers and sisters have some similar features but are not identical?
wierd question
Who developed airplane?
the Wright Brothers
Why are brothers who have the same parents not identical?
Ask your teacher that you don't get it!?!? Do your own HW!?!?
Who developed a successful automobile?
The Duryea Brothers
How many brothers did magic Johnson have?
Zero, as far as I'm concerned
Are mark and aj Ellis identical twin brothers?
No mark is 34 Aj is 31
Stamp with genelli and Saint Louis on itwhat is worth?
It is what is called a "Picture Stamp". The Hulbert Brothers Patented a camera in 1885 that had multiple lenses on it. It basically took 12 identical pictures at once. After developing they could be cut apart and distributed. Their are also some that are perforated (at an additional charge) for easy separation. Genelli bought the Patent License from the Hulbert Brothers.
