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प्रश्न
Differentiate between Identical twins and fraternal twins.
Distinguish between the following pair:
Identical and fraternal twins
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उत्तर १
Identical twins are produced from one ovum i.e. one developing zygote splits and grows into two foetuses whereas fraternal twins are produced when two ova get fertilized at a time.
उत्तर २
Identical twins: Identical twins being produced from a single egg are either both boys or both girls, and for the same reason, they are very similar (identical) to each other. Yet, everything is not similar in identical twins; for example, fingerprints, birthmarks, and even handwriting are not similar.
Fraternal twins: Sometimes, two eggs are released from ovaries at a time, and both may get fertilised to produce two individuals. Such twins, produced from two eggs, are called fraternal twins. Fraternal twins may be either both boys or both girls or one boy and one girl.
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संबंधित प्रश्न
Give the names.
Hormones secreted by the ovary of the female reproductive system.
Given here is a section of the female reproductive system of human beings.
Name the part where fertilisation occurs in human beings.
Explain the term Graffian follicle.
The implantation of the embryo occurs at about ______ days of fertilization.
Identify the labels (i, ii and iii) in the given diagram of the female reproductive system.
Structure connecting the fetus to placenta is ______.
The ability to reproduce is lost in a female after ______
The______ is also called the womb.
Write the specific location of the following:
Vagina
The figure given below is the human female reproductive system. Study the same and answer the following questions.
- Label the guidelines 1 to 6 shown in the figure.
- What is the normal gestation period in human?
- Where are the sperms released during coitus?
- Write two important functions of part 2.
- Mention the technical term for the fixing of developing zygote to the uterine wall.
