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  2. The meaning of TWIN is either of two offspring produced in the same pregnancy. How to use twin in a sentence.

    • Mirror Twins
    • Conjoined Twins
    • Parasitic Twins
    • Semi-Identical Twins
    • Female and Male Identical Twins

    Mirror twinsare exactly what they sound like! These twins are actual mirror images of each other. This means that: 1. Their hair may naturally fall in opposite directions. 2. Their teeth may grow in on opposite sides of their mouths. 3. They may have birthmarks on the opposite side of their bodies. 4. They also usually have different dominant hands...

    Conjoined twins are a rare twin type in which the two siblings are physically connected. Typically, conjoined twins are joined together at the chest or abdomen, but this varies. Some conjoined twins are connected to a greater extent than others. Most share at least one vital organ. Though physically attached to each other, conjoined twins are two i...

    Sometimes, as twins develop in utero, one twin becomes larger and more dominant. The other twin stops developing and begins to depend on their sibling. Known as parasitic twins, these twins are physically conjoined. However, the smaller twin is not fully formed and isn’t capable of surviving on their own. This is because the smaller twin is usually...

    There have only been two reported cases of semi-identical twins, so this type is extremely rare. In semi-identical twins, two separate sperm fertilize one egg. The fertilized egg then splits in two. So, semi-identical twins share all the same chromosomes from their birthing parent, but only about 50 percent from their non-birthing parent.

    Sometimes identical twins can be assigned the sex of male and female at birth. These twins start off as identical males with XY sex chromosomes. But shortly after the egg divides, a genetic mutation called Turner syndromeoccurs, leaving one twin with the chromosomes X0. This twin will be assigned female at birth but may have developmental issues, a...

  3. Research on twins helps answer questions about many aspects of being human. About three or four in every 1000 births are identical twins. There are different types of twins, identical and ...

    • Twin1
    • Twin2
    • Twin3
    • Twin4
    • Twin5
  4. Mar 14, 2023 · We talked with Ob/Gyn Julian Peskin, MD (who is a twin himself), about common types of twins, rare types of twins and everything else you’ve been wondering about twinning.

  5. en.wikipedia.org › wiki › TwinTwin - Wikipedia

    Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ('non-identical' or 'fraternal'), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell.

  6. TWIN meaning: 1. either of two children born to the same mother on the same occasion: 2. one of two very similar…. Learn more.

  7. to bring together in close relationship; pair; couple. to furnish a counterpart to or a replica of; match. Informal. to divide or convert into two, parts, similar items, etc.: The old movie palace will be twinned, making two smaller theaters.

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