do identical twins have different dna?
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It is true that identical twins share their DNA code with each other. This is because identical twins were formed from the exact same sperm and egg from their father and mother. (In contrast, fraternal twins are formed from two different sperm and two different eggs.)
1429725
Identical twins do indeed start with identical DNA—they are the result of the same sperm from dad and the same egg from mom. The original fertilized egg divides one or more times before the resulting clump of cells splits into two. Each clump of cells goes on to become one of the identical twins.
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DNA Differences Identical twins do indeed start with identical DNA—they are the result of the same sperm from dad and the same egg from mom. The original fertilized egg divides one or more times before the resulting clump of cells splits into two. Each clump of cells goes on to become one of the identical twins.
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We think of identical twins as having identical DNA. And they also each use their DNA a bit differently too. ... Even though this is true for all identical twins, we can't usually tell because the changes happen in parts of the DNA that don't affect how identical twins look.
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Blood type is entirely determined by DNA, so identical twins pretty much always have the same blood type. But because of the small changes in DNA that can happen in the womb, it's entirely possible for twins to have different blood types from each other.
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Identical twins share the same genotype, since their genomes are identical; but they never have the same phenotype, although their phenotypes may be very similar.
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Identical twins have 100% of their DNA the same while fraternal twins share only 50%. ... Fraternal twins are really just siblings who share the same womb. Each starts out as a separate egg fertilized by a separate sperm. They don't share any more DNA than do any two siblings.
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Identical twins are also known as monozygotic twins. They result from the fertilization of a single egg that splits in two. Identical twins share all of their genes and are always of the same sex.
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They're called identical twins because their genomes are identical. But even though all of their DNA is the same, they clearly are not. ... DNA and RNA sequencing technologies have advanced to the point where allele-specific expression can now be quantified.
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Identical twins start out as genetically identical: they have the same alleles. They are formed by a fertilised egg dividing into two separate individuals. They are always of the same sex, and are monozygotic or MZ twins (mono = one; zygote = fertilised egg). ... Fraternal twins are twice as common.
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Identical twins do indeed start with identical DNA—they are the result of the same sperm from dad and the same egg from mom. ... DNA differences or mutations can happen any time a cell divides. This is because a cell needs to copy its DNA before it can divide.
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Identical twins can be genetically different, which could explain why they do not always share disorders such as schizophrenia or autism, according to a study published in March in PLoS One. Identical twins develop from one fertilized egg, and so start out with the same genetic information from each parent.
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As CBC reports, “Despite having virtually identical DNA, the twins did not receive matching results from any of the companies.” That bit shouldn't come as a surprise. Each company uses its own special sauce to analyze DNA, so it's natural that there would be differences.
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The twins have the same DNA; thus, the same phenotypes. Unless one twin had an accident that caused damage to the reproductive organs, identical twins' reproductive organs are completely identical in size and shape because they have identical DNA. If the twins are fraternal, no more likely than any other siblings.
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Identical twins do not have identical fingerprints, even though their identical genes give them very similar patterns. ... Small differences in the womb environment conspire to give each twin different, but similar, fingerprints. In fact, each finger has a slightly different pattern, even for your own fingers.
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It is true that identical twins share their DNA code with each other. This is because identical twins were formed from the exact same sperm and egg from their father and mother. ... Usually, the egg and sperm come together and create an embryo, which eventually grows into a human baby.
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So even though identical twins have the same DNA, they are using it in different ways. ... For example, we know that identical twins can be different heights. This means height can't be controlled by your genes alone, because identical twins have the same genes. So height must be part nature and part nurture.