Question
What is aneuploidy? Differentiate between trisomic and triploid condition? Name any one trisomic condition found in human.
✓
Answer
Aneuploidy is a phenomenon which occurs due to non–disjunction resulting into gain or loss of one or more chromosomes during meiosis.
| S. No. | Trisomic condition | Triploid condition |
| (i) | This occurs when a chromosome occurs in three copies in a diploid cell. | This occurs when a cell contains three sets of chromosomes. |
Trisomic condition in human: Down’s syndrome.
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
Describe the types of fruits.
Highlight the differences between the population interactions given below. Give an example of each.
- Parasitism.
- Amensalism.
- Mutualism.
What do you mean by semi-conservative replication? Describe the experiment conducted by Matthew Meselson and Franklin Stahl to prove that semi-conservative replication occurs in DNA. Draw a diagram of the semi-conservative DNA replication model.###What is the semi-conservative replication of DNA? Who proved this? Explain this experiment in detail.
A large number of married couples the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless.
- Why in your opinion the female partner is often blamed for such situations in India? Mention any two values that you as a biology student can promote to check this social evil.
- State any two reasons responsible for the cause of infertility.
- Suggest a technique that can help the couple to have a child where the problem is with the male partner.
Explain co-evolution with reference to parasites and their hosts. Mention any four special adaptive features evolved in parasites for their parasitic mode of life.
OR
Explain parasitism and co-evolution with the help of one example of each.Following are two groups of birth control measures. Rank the members of each group from the best (1) to the worst (4) on the basis of effectiveness.
| S.No. | A | S.No. | B |
| (a) | Coitus interruptus | (e) | Vasectomy |
| (b) | Spermicidal Jelly/ cream | (f) | Natural family planning |
| (c) | Condom + spermicide | (g) | Diaphragm + spermicide |
| (d) | Natural family planning | (h) | IUD |
Pollen banks are playing a very important role in promoting plant breeding programme the world over. How are pollens preserved in the pollen banks? Explain. How are such banks benefitting our farmer? Write any two ways.
- What are the transcriptional products of RNApolymerase III?
- Differentiate between 'Capping' and 'Tailing'.
- Expand hnRNA.
Answer the following questions:
Describe the endosperm development in coconut.
Describe the endosperm development in coconut.
Study the diagram given below:
