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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
Give the appropriate term for the following:
Monthly discharge of blood and disintegrated tissues in the human female
After puberty human female shows cyclic changes in her reproductive system. Explain structural and hormonal changes in the uterus.
(OR)
Give reasons :
(1) Scrotal sac serves as thermoregulator.
(2) Corpus luteum gets converted into corpus albicans in absence of fertilization.
(3) Missing of menses is the first indication of pregnancy.
(4) Surgical sterilization is a permanent method of birth control. (5) Human egg is microlecithal.
Given here is a section of the female reproductive system of human beings.
Name the part where fertilisation occurs in human beings.
Give Technical Term:
Name the tube that leads from the ovary to the uterus.
How many lobes are generally present in each mammary gland?
The part of fallopian tube closest to the ovary is ______.
The ______ is also called the womb.
The ______ is also called the womb.
Which of the following is not a component of Fallopian tube?
At what age does puberty begin in females?
