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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
Put a tick mark (✓) against the correct alternative in the following statement:
Internally, the uterus opens into:
State the function of Ovary.
In female, after how much time after fertilization, does the fertilized egg get implanted in the
uterine wall?
Complete the following statement by choosing the correct alternative:
Menstrual flow is a character is the feature of ______.
Name the Following
The female copulatory organ in humans.
Identify the layer that makes up the corona radiate.
Egg is liberated from ovary in ______.
Figure A shows the front view of the human female reproductive system and Figure B shows the development of a fertilized human egg cell
Figure A
Figure B
Identify the correct stage of development of the human embryo (Figure B) that takes place at the sites X, Y, and Z respectively in the human female reproductive system (Figure A).
Choose the correct option from the table below:
| X | Y | Z | |
| A | Morula | Fertilized egg | Blastocyst |
| B | Unfertilized egg | Fertilized egg | Morula |
| C | Blastocyst | Fertilized egg | Unfertilized egg |
| D | Fertilized egg | Morula | Blastocyst |
What is placenta? Mention its role during pregnancy?
Rewrite the terms in the correct order so as to be in a logical sequence.
Graafian follicle, ostium, uterus, fallopian tube, ovum.
