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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.
संबंधित प्रश्न
Which part of the human body produces Ova?
The diagram given below represents a system in the human body. Stud the diagram and answer the following questions: 
Mention the number and the name of the part involved in fertilization and implantation from the above diagram.
Name the following:
The organ of female in which the foetus develops.
Name the Following
The term used when beard and mustache appear, harshening of voice, broadening of shoulders, etc. takes place.
A neat labelled diagram describes the parts of a typical angiospermic ovule.
______ pollen mother cells should undergo meiotic division to produce 64 pollen grains.
Which of the following is ectodermal in origin?
| (i) | Heart |
| (ii) | Sweat glands |
| (iii) | Adrenal medulla |
| (iv) | Middle ear |
| (v) | Urinary bladder |
| (vi) | Dermis of skin |
In human beings, the correct sequence of events during reproduction is
Anterior lobe of pituitary secretes:
One mature ovum is released once every ______ days.
