Genetics, Molecular Biology and Evolution-Sex Determination [IFS (Forest Services) Botany]: Questions 1 - 6 of 6
Choose Programs:
📹 Video Course 2024 (101 Lectures [53 hrs : 32 mins]): Offline Support
Rs. 280.00 -OR-
1 Month Validity (Multiple Devices)
Preview All LecturesDetails
🎓 Study Material (438 Notes): 2024-2025 Syllabus
Rs. 550.00 -OR-
3 Year Validity (Multiple Devices)
Topic-wise Notes & SampleDetails
🎯 1252 Questions (& PYQs) with Full Explanations (2024-2025 Exam)
Rs. 1600.00 -OR-
3 Year Validity (Multiple Devices)
CoverageDetailsSample Explanation
Help me Choose & Register (Watch Video) Already Subscribed?
Question 1
Appeared in Year: 2014
Describe in Detail Subjective▾
What is accounted for by Lyon՚s hypothesis? Cite an example. (Paper 2)
EditExplanation
Lyon՚s Hypothesis
- Whenever the number of X chromosome was two or more than two; the number of Barr bodies was One Less than the number of X chromosomes. Thus, in normal female only one active X chromosome is present.
- One bare body is present in XX female and XXY male one bare bodies is present.
- In XXXY male and XXX Meta female two Barr body is present…
… (172 more words, 7 figures) …
Question 2
Appeared in Year: 2015
Write in Short Short Answer▾
X/A ratio is not only a primary sex determining signal but has several major regulatory genes in function. Discuss what role they play in sex differentiation, with suitable examples. (Paper II)
EditQuestion 3
Explanation
Sex Determination
- It is a biological system that determine the development of the sexual characters of an organism.
- Most of the mechanisms of the determination of the sex are controlled in molecular level.
- They classified into these categories
- Sex chromosome mechanism or Heterogamesis
- Genic balance mechanism
- Male haploidy or haplodiploidy mechanism
- Single…
… (317 more words, 7 figures) …
Question 4
Appeared in Year: 2017
Describe in Detail Subjective▾
With suitable example, explain the tripartite sex determination.
EditExplanation
Sex Determination
- It is a biological system that determines the development of the sexual characters of an organism.
- In some angiosperm the tripartite sex determination is seen.
Tripartite Sex Determination
Involvement of three sex chromosome to determine the development of sexual characters of an organism. For example- XXX or XXY, etc.
For Example
- In Ac…
… (74 more words, 6 figures) …
Question 5
Appeared in Year: 2020
Describe in Detail Subjective▾
Write Note on: Chromosomal sex determination in higher plants (Paper-2)
EditExplanation
- In higher plants, the phrase “chromosomal sex determination” refers to the process that determines the gender of an individual plant depending on whether or not certain chromosomes that are associated with sexuality are present in that plant. In contrast to mammals, in which the chromosomes that determine sexuali…
… (474 more words, 7 figures) …
Question 6
Appeared in Year: 2023 (IAS)
Describe in Detail Subjective▾
Describe the three modes of sexual reproduction in bacteria. (Paper 1)
EditExplanation
Bacteria primarily reproduce asexually through processes like binary fission, where a single bacterial cell divides into two identical daughter cells. However, some bacteria are capable of sexual reproduction, which involves the exchange of genetic material between two bacterial cells. Here are the three main modes of sexual reproduction in bacteri…
… (293 more words, 24 figures) …