हिंदी
Maharashtra State BoardSSC (English Medium) 10th Standard

The Twins

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Topics

  • Definition: Twins
  • Definition: Monozygotic Twins
  • Definition: Conjoined Twins (Siamese Twins)
  • Definition: Dizygotic Twins
Maharashtra State Board: Class 10

Definition: Twins

When two embryos develop simultaneously in the same uterus and two offsprings are delivered at the same time, they are called twins.

Maharashtra State Board: Class 10

Definition: Monozygotic Twins

When a single embryo divides into two groups of cells within 8 days after zygote formation, and both develop into separate embryos, they are called monozygotic twins.

Maharashtra State Board: Class 10

Definition: Conjoined Twins (Siamese Twins)

If the embryo splits into two groups after 8 days of zygote formation, the resulting twins may be born with body parts joined together, and some organs may be common. Such twins are called conjoined twins.

Maharashtra State Board: Class 10

Definition: Dizygotic Twins

When two oocytes are released and fertilised by two different sperms, forming two zygotes, which develop separately, the offsprings are called dizygotic twins.

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