Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to :
(a) Substitution
(b) Addition
(c) Deletion
(d) Translocation
(e) Inversion
Choose the most appropriate answer from the options given below
(a) Substitution
(b) Addition
(c) Deletion
(d) Translocation
(e) Inversion
Choose the most appropriate answer from the options given below
- (c) and (d) only
- (d) and (e) only
- (a) and (b) only
- (b) and (c) only
The Correct Option is D
Solution and Explanation
Aneuploidy refers to an abnormal number of chromosomes, which is not a multiple of the haploid set. This arises due to errors during chromosome segregation in meiosis.
Addition (B) and Deletion (C): These directly lead to aneuploidy. Nondisjunction, where chromosomes fail to separate correctly, can result in the addition or deletion of chromosomes in gametes.
Substitution (A): Involves replacing one nucleotide with another and does not change the chromosome number.
Translocation (D): Involves the transfer of a segment of a chromosome to a nonhomologous chromosome. While potentially causing other genetic disorders, balanced translocations do not directly cause aneuploidy because the total number of chromosomes remains the same.
Inversion (E): A segment of the chromosome is reversed end-to-end. This doesn’t change
the chromosome number.
Top Questions on Genetics
- In the F1 generation (RrIi), if recessive genes are crossed, how many zygotes will form?
- Which one is termed as the "guardian of the genome"?
- If a sequence has the initiator codon AUG, which codes for methionine, then:
Statement I: Yes, the translation process starts with methionine (AUG is the universal start codon)
Statement II: Methionine may or may not be present in the final protein, as it can be cleaved during post-translational modifications. - Where is Satellite DNA located?
- Mule is the result of:
- KCET - 2024
- Biology
- Genetics
Questions Asked in NEET exam
- Given below are two statements :
Statement I : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement II : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.
In the light of above statements, choose the most appropriate answer from the options given below :- NEET (UG) - 2024
- Organ And Organ System
- The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called;
- NEET (UG) - 2024
- Biodiversity
- Given below are two statements:
Statement I: In C3 plants, some O2 binds to RuBisCO, hence CO, fixation is decreased.
Statement II: In C4 plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration.
In the light of the above statements, choose the correct answer from the options given below:- NEET (UG) - 2024
- respiration in plants
- Given below are two statements :
Statement I : In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes.
Statement II : The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption.
In the light of the above statements, choose the correct answer from the option given below :- NEET (UG) - 2024
- Nephrons
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector\(\vec{P}\) of magnitude, 4 × 10-6 C m, is ± 9 × 103 V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :- NEET (UG) - 2024
- Magnetic Field