Class 11 Biology - Chapter Cell cycle and Cell Division NCERT Solutions | Discuss with your teacher about (i) hapl
Welcome to the NCERT Solutions for Class 11th Biology - Chapter Cell cycle and Cell Division. This page offers a step-by-step solution to the specific question from Exercise 1, Question 13: discuss with your teacher about i haploid insect....
Question 13
Discuss with your teacher about
Discuss with your teacher about
(i) haploid insects and lower plants where cell-division occurs, and
(ii) some haploid cells in higher plants where cell-division does not occur.
Answer
(i) In some insects and lower plants, fertilization is immediately followed by zygotic meiosis, which leads to the production of haploid organisms. This type of life cycle is known as haplontic life cycle.
(ii) The phenomenon of polyploidy can be observed in some haploid cells in higher plants in which cell division does not occur. Polyploidy is a state in which cells contain multiple pairs of chromosomes than the basic set. Polyploidy can be artificially induced in plants by applying colichine to cell culture.
More Questions From Class 11 Biology - Chapter Cell cycle and Cell Division
- Q:- Describe the following:
(a) synapsis
(b) bivalent
(c) chiasmata
Draw a diagram to illustrate your answer. - Q:- How does cytokinesis in plant cells differ from that in animal cells?
- Q:- Describe the events taking place during interphase.
- Q:- Why is mitosis called equational division?
- Q:- What is G0 (quiescent phase) of cell cycle?
- Q:- Can there be DNA replication without cell division?
- Q:- Distinguish anaphase of mitosis from anaphase I of meiosis.
- Q:- Name the stage of cell cycle at which one of the following events occur:
(i) Chromosomes are moved to spindle equator
(ii) Centromere splits and chromatids separate
(iii) Pairing between homologous chromosomes takes place
(iv) Crossing over between homologous chromosomes takes place - Q:- Analyse the events during every stage of cell cycle and notice how the following two parameters change
(i) Number of chromosomes (N) per cell
(ii) Amount of DNA content (C) per cell - Q:- Find examples where the four daughter cells from meiosis are equal in size and where they are found unequal in size.
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