· Basically, fraternal twins are as alike as siblings would be — in other words, they are not identical Fraternal twins might be two boys, two girls, or a boy and a girl Each baby develops in his or her own placenta · Generally, identical twins can only be the same gender However, rare cases, such as sesquizygotic (semiidentical) twinning may cause identical twins to be a boy and a girl · Twins of different genders are universally accepted as a sound basis for a clinical determination that boy and girl twins are not identical However, in extremely rare cases, boy and girl twins can stem from the same fertilized egg Twins, who stem from the same fertilized egg, are called monozygotic twins
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Can twins that are boy and girl be identical
Can twins that are boy and girl be identical- · Its not possible Because being different genders makes them unidentical Identical twins occur with the splitting of 1 egg So if the egg that was fertilized was fertilized with a "Y" chromosome they will be a boy, or an "X" chromosome will be a girl If they egg splits, it can't change chromosomes once its fertilized · A twin boy and girl may be identical, according to a study found on NCBI, although this situation is very rare Usually identical twins share the same gender they are either a pair or boys or girls In rare instances, however, identical twins form from an egg and sperm that begin as males (sharing XY chromosomes) then change to become a male and female pair
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· Young Queensland twins, a boy and a girl, have been identified as only the second set of semiidentical twins in the world – and the first to be identified by doctors during pregnancyIt would just require constant observation during conception to confirm The theory states that polar body twins form when an egg drops and · When your twins are a boy and girl pair, the answer is easy, but people don't always realize it Many think that being identical twins refers to how twins look and not how they form Take a look at the biology that determines the sex combinations that are possible with identical and fraternal twins
· It's fascinating to find out boy and girl monozygotic twins are possible, although extremely rare This only happens when one of the embryos starts as a male zygote, and then develops a chromosomal condition called Turner Syndrome #8 Identical twins ultrasound Most people can determine twins are identical based on how alike they look · The boy and the girl, now four, from Brisbane, in Australia, are identical on their mother's side But they share only a proportion of their father's DNA · Later in the pregnancy, however, the woman's doctors were surprised to see that the twins were a boy and a girl Because identical twins share all of their genes, they can't be of opposite sexes
· DOCTORS say they have discovered the world's second known case of semiidentical twins born from one egg and two sperm The now fouryearold boy and girl, from Brisbane, Australia, are identical · I am an identical twin (and 31 years old), and just found this out about a month ago I was watching a show on the Discovery Health channel that talked about multiples, and how doctors are using the term "monozygotic" rather than "identical" now, because an egg can split and become one boy and one girl! · "Certainly if you dress the girl as a boy, or the boy as a girl, you would think they were identical twins "They're very cute and they're doing very well" So could there be others?
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· 1719 #14 Natgar wrote » Identical twins can be opposite sex if the embryos started male but one twin drops a y chromosme and has Turner's Syndrome as with no "Y" chromosome, that twin becomes a girl with a single chromosome There have been about 5documented cases,so very rareThe majority of the twins are going to be fraternal twin's, which means that there were two eggs that were fertilized This is different from identical twins, where one egg was able to separate into two eggs in order to become two distinct lives Fraternal twins can be of either gender and they can be a combination of boys and girls · Among nontwin births, males are slightly (about five percent) more common than females In the US, 105 nontwin males are born for each 100 nontwin females However, males are slightly more likely than females to die in the womb And because the death rate in the womb is higher for twins than for singleton births, female twins are more common
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Can male/female twins ever be identical? · So no, your boy/girl twins are not identical There is an extremely rare case that can happen where the zygote splits to form identical twins but one of the pair doesn't get both sex chromosomes Thus you'd have one girl with Turner Syndrome, a genetic disorder where she has just one X chromosome · There are the ones already mentioned and you can also get polar body twins which are half identical so share 75% of their DNA Basically the egg splits before it's fertilised and then is fertilised by 2 different sperm So the twins share 100% from their mum and 50% from their dad Their is a lady on the AAM board that has MCDA boy/girl twins
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Check out this link · Boy/Girl Monozygotic (Identical) Twins Identical twins are always the same gender because they form from a single zygote that contains either male (XY) or female (XX) sex chromosome In the past, there have been a few reported cases of a genetic mutation in some male twins where one twin loses a Y chromosome and develops as a female · But what happens if you bring up someone who was a boy as a girl?
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· Boy/girl monozygotic (identical) twins In very rare cases, identical twins can be different sexes These twins begin as identical male twins Like all males, they both have XY sex chromosomes, · Doctors in Australia say they have identified a second case of twins apparently created from one egg and two sperm, a boygirl combination in whom the mother's DNA is identical in both babies but · Fraternal twins can either be two boys, two girls, or a boy and girl They may or may not look a lot alike That's because, unlike identical twins, they don't share the exact same DNA
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