Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
ZoologyPrinciples of Inheritance and VariationGenetic DisordersEasy2 minPYQ_2020
ZoologyEasysingle choice
Match the following with respect to chromosomal mutation
| Column I | Column II | ||
| a. | Tetrasomy | (i) | AABB |
| b. | Double trisomy | (ii) | 2n – 1 |
| c. | Hypoploidy | (iii) | 2n + 1 |
| d. | Allopolyploidy | (iv) | 2n + 2 |
| (v) | 2n + 1 + 1 |
Options:
Answer:
B
Solution:
A tetrasomy is a form of aneuploidy with the presence of four copies, instead of the normal two ( 2n + 2) , Double aneuploidy leading to trisomy or monosomy of 2 different chromosomes arises because of 2 meiotic non-disjunctional events (2n + 1 + 1) , In Hypoploidy ,having a chromosome number lower by only a few chromosomes than the normal diploid number (2n - 1), Allopolyploids are polyploids with chromosomes derived from different species. Precisely it is the result of multiplying the chromosome number in an F1 hybrid.
Stream:NTA_ABHYAS_NEETSubject:ZoologyTopic:Principles of Inheritance and VariationSubtopic:Genetic Disorders
⏱ 2mℹ️ Source: PYQ_2020
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