Question
State the three principles of Mendel’s law of inheritance.
✓
Answer
Mendel’s Laws of Inheritance:
- Based on his hybridisation experiments, Mendel proposed the laws of inheritance.
- His theory was rediscovered by Hugo de Vries of Holland, Carl Correns of Germany and Eric von Tschermak of Austria in 1901.
- Law of dominance:
- This law states that when two alternative forms of a trait or character (genes or alleles) are present in an organism, only one factor expresses itself in $F_1$ progeny and is called dominant while the other that remains masked is called recessive.
- Law of segregation:
- This law states that the factors or alleles of a pair segregate from each other during gamete formation, such that a gamete receives only one of the two factors. They do not show any blending.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Work out a monohybrid cross upto F, generation, between two pea plants and two Antirrhinum plants, both having contrasting traits with respect to colour of flower. Comment on the patterns of inheritance in the crosses carried above.
What is spermatogenesis? Briefly describe the process of spermatogenesis.
Write the name of causative agent and symptoms of following sexually transmitted diseases.
1. Syphilis, 2. Gonorrhea, 3. Herpes Genitalis, 4. Trichomoniasis, 5. Chalmydiasis, 6. AIDS, 7. Genital Warts, 8. Vaginitis.
1. Syphilis, 2. Gonorrhea, 3. Herpes Genitalis, 4. Trichomoniasis, 5. Chalmydiasis, 6. AIDS, 7. Genital Warts, 8. Vaginitis.
i. How and why is charging of tRNA essential in the process of translation?
ii. State the function of ribosome as a catalyst in bacteria during the process of translation.
iii. Explain the process of binding of ribosomal units to mRNA during protein synthesis.
ii. State the function of ribosome as a catalyst in bacteria during the process of translation.
iii. Explain the process of binding of ribosomal units to mRNA during protein synthesis.
Arrange the following in the decreasing order (most important first) of their importance, for the welfare of human society. Give reasons for your answer.
Bioreactors are the inclusion carriers in any biotechnology based production process. The ultimate success of any biotechnological technique depends on the efficiency of the bioreactor due to large scale production and economy.
In the context of the above passage, answer the following questions :
(i) For optimization of a bioreactor system, list possible operating instructions (rules). Make a list of any four.
(ii) "Optimal growth and metabolic activities of cells." Mention the stages of growth mentioned in.
(iii) Is the bioproduct formed in the bioreactor completely ready for immediate use as desired? Write the appropriate reasons also to support your answer.
In the context of the above passage, answer the following questions :
(i) For optimization of a bioreactor system, list possible operating instructions (rules). Make a list of any four.
(ii) "Optimal growth and metabolic activities of cells." Mention the stages of growth mentioned in.
(iii) Is the bioproduct formed in the bioreactor completely ready for immediate use as desired? Write the appropriate reasons also to support your answer.
Match the items in Column I with those in Column II.
| S.No | Column I | S.No | Column II |
| A. | ABO blood group in humans | 1. | Polygenic inheritance |
| B. | Flower colour in snapdragon | 2. | Mendelian genetic disorder |
| C. | Human skin colour | 3. | Sex-linked Mendelian disorder |
| D. | Phenylketonuria | 4. | Incomplete dominance |
| 5. | Multiple allelism |
- One of the sperms is observed to penetrate 'a' of the ovum, as shown in the above diagram. Name 'a'.
- How is the sperm able to do so?
- Where exactly in the fallopian tube does this occur?
- Explain the events thereafter up to morula stage.
Give an account of energy flow in an ecosystem.
What is decomposition? Describe the decomposition cycle in a terrestrial ecosystem. Assist your answer with diagramatic representation.