Genetics, Molecular Biology and Evolution-Quantitative Genetics [IFS (Forest Services) Botany]: Questions 1 - 6 of 8
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: 2018
Describe in Detail Subjective▾
What is polyembryony? how՚s it induced? Discuss its applications.
EditExplanation
Polyembryony
- After the fertilization, the ovules mature into the seeds. In a normal situation one embryo is present in the each seed. But sometimes more than one embryo is present in a seed. This condition is called polyembryony.
- The presence of more than one embryo in the seed is called polyembryony.
- In nature there are some plants which have more th…
… (293 more words) …
Question 2
Appeared in Year: 2019
Describe in Detail Subjective▾
Discuss the structure and function of synaptonemal complex, mentioning its location. State the different structural types of DNA with outline sketches.
EditExplanation
In Meiosis
- During prophase I in zygotene stage.
- The pairing of homologous chromosome takes place.
- Homologous chromosome which comes from the mother and father are attached towards each other and their pairing take place.
- That pairing is called synapsis.
- Synapsis begins at more than one point along the length of the homologous chromosome.
- 3 types of synap…
… (117 more words, 10 figures) …
Question 3
Appeared in Year: 2018 (IAS)
Describe in Detail Subjective▾
Gray seed colour in peas is dominant over the white. In the following experiments, parents with known phenotypes but unknown genotypes produced the following progeny:
Parents | Progeny | |
Gray | White | |
Gray X White | 82 | 78 |
Gray X Gray | 118 | 39 |
White X White | 0 | 50 |
Gray X White | 74 | 0 |
Gray X Gray | 90 | 0 |
Explanation
Using the letter G for gray and g for white, give the genotype of each parent.
- GG = Grey (Dominant)
- Gg = Grey (Intermediate)
- gg = White (Recessive)
… (231 more equations) …
Question 4
Appeared in Year: 2018 (IAS)
Describe in Detail Subjective▾
Explain the concept of multiple alleles with one example.
EditExplanation
The allele is the alternate version of a gene. These alleles are in charge of the variance in how a certain attribute is expressed phenotypically, such as the distinction between brown and green eyes. A gene can have two or more alleles. Every gene is inherited twice, once from each parent. As a consequence, a characteristic would have two unique a…
… (508 more words, 3 figures) …
Question 5
Appeared in Year: 2022 (IAS)
Describe in Detail Subjective▾
Explain the phenomenon of incomplete dominance and its significance.
EditExplanation
Incomplete Dominance: A monohybrid cross of a red-flowered snapdragon (Antirrhinum majus) with a white flowered variation did not generate red or white flowered plants in , despite mendelism. Instead, the blossoms are pink, indicating a middle ground between the two parents. This is because neither red nor white flower color is …
… (297 more words) …
Question 6
Appeared in Year: 2022 (IAS)
Describe in Detail Subjective▾
Write a short note: Multiple factor hypothesis (Paper II)
EditExplanation
Mendel՚s laws of heredity provide a straightforward and correct explanation of qualitative differences among plants and animals, such as blossom color (red or white) and seed color (yellow or green) . However, many characteristics, such as weight, height, and IQ in men, are quantitative rather than qualitative.
Other key characteristics in cultivate…
… (574 more words) …