Monochorionic, diamniotic (MCDA) twins are the product of a single fertilized ovum (egg), resulting in genetically identical offspring 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 The Twins That Are Neither Identical nor Fraternal They shared a placenta, but on the ultrasound, one looked like a boy, and the other a girl
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Boy and girl twins can be identical- Dizygotic Twins and Gender Boygirl twins are the most common kind of dizygotic twins, occurring 50 percent of the time What causes Monochorionic Diamniotic twins?Check out this link
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A boy has XY chromosomes and a girl has XX chromosomes Girlboy twins occur when one X egg is fertilized with an X sperm, and a Y sperm fertilizes the other X egg Sometimes health care professionals identify samesex twins as fraternal or identical based on ultrasound findings or by examining the membranes at the time of delivery The twins can be two girls, two boys, or a boy and a girl Identical twins occur when a single fertilized egg splits and develops into two fetuses Identical twins might share a placenta and an amniotic sac or the twins might share a placenta and each have separate amniotic sacs Genetically, the two babies are identicalIn 999% of cases boy/girl twins are nonidentical However, in some extremely rare cases resulting from a genetic mutation, identical twins from an egg and sperm which began as male (XY) can develop into a male / female pair This happens when the fertilised egg 'loses' one of the copies of the Y chromosome when it is dividing into two
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 rare For identical twins As identical twins grow from a single fertilized egg that later split to form two zygotes with the same genetic material, the gender of both the babies will be the same That means they can either be both females or both males Let us look at#BodyBizarre #BornDifferent #ConjoinedTwinsCan conjoined twins be a boy and a girl?So far, all the conjoined twins featured in our channel are whether two bo
Identical question by Anonymous I have a boy and a girl and I get "Are they Identical?" all the time I used to say, nope, 1 boy/1 girl Then i would get the head tilt and say, um, they can't be identical, one has a penis lol they usually get it at that point but this one lady I had to explain identical means identical in everyway 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 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!
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Boy/girl twins are always fraternal or ( dizygotic ); Fraternal and identical twins can be affected by pregnancy complications, and subsequent birth defects One of the most common issues is that twins are very often delivered preterm, often due to DNA testing is the surefire way to determine if twins are identical or fraternal Fraternal Twins Boy and Girl Since conception happened for each egg, each egg carries the sex chromosome of the father A girl has XX chromosomes while a boy has XY chromosomes A boygirl combination is the most common form of these kind of twins
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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 may occur but the sex always stays the same Boygirl twins are always two different cells meaning that they are not identical The term for
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Monozygotic twins share the same genetic makeup, or genotype (although their DNA is not necessarily identical) 13 This shared DNA is what makes them often have remarkably similar appearances and characteristics Unlike monozygotic twins, fraternal twins may look nothing alike, including having different Monozygotic twinning (or identical twins) results when a single fertilized egg splits and forms two embryos Having BoyGirl Twins Doesn't Mean You've Hit There was only one explanation– TWINS, again (Twins are hereditary, so I suppose it shouldn't have been a huge surprise– but honestly, it didn't really cross my mind at the time) But this time, instead of two heifers (females), we had a mixed set one boy and one girl Uhoh
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The semiidentical twin boy and girl born in Australia were found to have 100 per cent of their mother's DNA in common, but were only 78 per cent identicalUsually not Because if so, they would have different sex chromosomes (one will have XX and the other XY) Identical twins develop from a single zygote that later splits in two They have the same genes and usually look very similar They are alwaBabychakra is the number 1 parenting app in India and is a new mom's best
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This can happen because the ovaries release two eggs and not just one 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 Identical Twins (Monozygotic) IT IS POSSIBLE to have identical twins of different genders, it may be extremely rare, but is definitely a possible phenomenon To know more about this myth, and all the other kinds of twins sets, do read my guest blog on Babychakra Types of Twins you Never Knew About! Another site said that 1/3 of all twins are identical Others give different numbers If I take that first pair of numbers, we get the probability of two boys, or of two girls, is , and the probability of one of each is So each probability is about 1/3
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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 identicalYes, boy/girl twins can be identical although it is not a pleasant situation As most of us know from all the research we did when we found out we were having twins, the difference between identical and fraternal twins is that identical twins arise from the splitting of one egg Fraternal twins occur as a result of two eggs being released by Identical twins are always boy/boy or girl/girl But if that egg split happens on days 2 or 3, before the sac has started to form, each zygote develops its own sac and placenta What looks like fraternal twins to medical professionals is actually identical twins!
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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 Your odds of having twins go up with each pregnancy Age Being older can also contribute to twin birth Studies have shown that people who are over 35 have a higher chance of getting pregnant with nonidentical twins This is possibly because after the age of 35, the ovaries release more than one egg per month more often This is due to the twins not sharing the same DNA like identical twins and are physically different in appearance Fraternal twins occur when there are two separate eggs which are fertilised by two separate sperm cells With fraternal twins you can have either two girls, two boys or boy and a girl combinations
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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 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, instead of XX like all females do VeryCan male/female twins ever be identical?
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Due to not sharing the same DNA, they can be either boy / girl, boy / boy and girl / girl combinations Identical or monozygotic twins – As the name suggests, identical twins are just that and are created by one fertilised egg splitting into two This creates two identical babies that will share the same DNA Technically speaking, yes there are semiidentical or maternal twins can be a boy and a girl However, it is not without risk or genetic anomalies to the fetus Even though sesquizygotic twins are very rare, the risks of genetic problems in one Can Boy/Girl Twins Be Identical?
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They can only form from two separate eggs that are fertilized by two separate sperm The terms identical and fraternal don't describe what the twins look like, but actually how they form If you are a girl and your twin is a boy, then the answer is clear, but if both of you are either males or females, then one automatically assumes that you two are identical In order to understand how mirror twins are formed, you need to know about zygosity The trick is determining whether boyboy twins or girlgirl twins are truly identical or if they are fraternal If you have twins of the same sex, oftentimes there's little to no way that you can tell until after birth, through blood typing or DNA testing if they are identical or fraternal
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Identical (monozygotic) twins are always of the same sex because they form from a single zygote (fertilized egg) that contains either male (XY) or female (XX) sex chromosomes A set of boy/girl twins can only be fraternal (dizygotic) Boy/girl twins cannot be identical (monozygotic) Click to Some people actually think a boy and a girl can be identical The funniest question Carl and I got when people found out we were twins—and we got this frequently—was, "Are you guys identical or fraternal?"By Anonymous Actually, there can be identical boy/girl twins if the sex gene of the embryo has an extra x chromosome (the fertilized egg would be an xxy) then when the egg splits one can have xx (girl) genes and one can have xy (boy) genes Rare but possible Only 4 ever recorded cases
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