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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
Name the following:
Organ producing ovum.
The below diagram represents the sectional view of the female reproductive organs of a mammal.
(i) Label the parts numbered 1 to 7.
(ii) What are the main functions of the parts labeled 2, 5, 6?
Write the functional activity of the following structure:
Graafian follicle
Identify the labels (i, ii and iii) in the given diagram of the female reproductive system.
Which one the following is a part of external genitalia of a female human being?
The opening of the vagina is often covered partially by a membrane called ______.
Anterior lobe of pituitary secretes:
In which part of the human female reproductive system do the following events take place?
Release of first polar body
Which uterine layer contracts strongly during childbirth delivery?
How many mammary lobes does each breast have?
