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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
Mention the exact location of the following :
Amniotic fluid
Give Reasons
Most often only one embryo is formed at a time although there are two ovaries in women. Explain.
Name the Following
The age or period when the reproductive organs become fully operational.
Generally, every month, __________ ovum is released in the abdominal cavity alternately from each ovary.
Breasts are the modified ______ glands.
Which of the following is correct about mammalian testes?
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
For subject 2 it is observed that the peak for hormone B has reached the plateau stage. After approximately how much time will the curve for hormone B descend?
When the foetus is growing inside the uterus it needs nutrients. Which part provides these nutrients?
Anterior lobe of pituitary secretes:
List two roles of the Oviduct in the human reproductive system.
