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प्रश्न
Distinguish between a gamete and zygote. Explain their roles in sexual reproduction.
उत्तर
| Gamete | Zygote |
| Gametes are formed through meiosis. | It is formed from the fusion of male and female gametes. |
| It is the sex cell or germ cell that takes part in fertilisation. | It is the product of fertilisation. |
| The gametes are of two types - male and female gametes, each possessing characters of their parents. | It possesses characters of both the parents. |
| It is the last cell of its generation. | It develops into an embryo which grows into a new individual so, zygote is the first cell of the new generation. |
- Role of gamete in sexual reproduction - Gamete is the sex or germ cell specialised to take part in sexual reproduction. Fusion of a male gamete with a female gamete produces a zygote.
- Role of zygote in sexual reproduction - Zygote develops into an embryo that later forms the new individual.
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संबंधित प्रश्न
Production of new individuals from the vegetative part of parent is called ______.
Describe the different methods of asexual reproduction. Give examples.
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Why are budding, fragmentation and regeneration all considered as asexual types of reproduction? With neat diagrams explain the process of regeneration in Planaria.
Lila observed that a pond with clear water was covered up with a green alga within a week. By which method of reproduction did the algae spread so rapidly?
Why is it not possible to reconstruct the whole organism from a fragment in complex multicellular organisms?
| The most obvious outcome of the reproduction process is the generation of individuals of similar design, but in sexual reproduction they may not be exactly alike. The resemblances as well as differences are marked. The rules of heredity determine the process by which traits and characteristics are reliably inherited. Many experiments have been done to study the rules of inheritance. |
- Why an offspring of human being is not a true copy of his parents in sexual reproduction?
- While performing experiments on inheritance in plants, what is the difference between F1 and F2 generation?
- (A) Why do we say that variations are useful for the survival of a species over time?
OR
(B) Study Mendel's cross between two plants with a pair of contrasting characters.
RRYY × rryy Round Yellow Wrinkled Green He observed 4 types of combinations in F2 generation. Which of these were new combinations? Why do new features which are not present in the parents, appear in F2 generation?
