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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
Identify True/False statement. Correct false statement to make it true.
Presence or absence of hymen is not a reliable indicator of virginity or sexual experience.
In female, after how much time after fertilization, does the fertilized egg get implanted in the
uterine wall?
Choose the odd one in each of the following:
Ovary; fallopian tube; ureter; uterus
Name the Following
A female gonad is responsible for the production of ova.
The follicular fluid present in the antrum is secreted by ______
Ovulation occurs under the influence of ______.
Structure connecting the fetus to placenta is ______.
How does fertilisation take place? Fertilisation occurs once in a month. Comment.
Mother gives birth to a baby but the baby has characters of both parents. How is this possible?
Draw a neat diagram of the female reproductive system and label the parts associated with the following:
(a) production of gamete
(b) site of fertilisation
(c) site of implantation
(d) birth canal
