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Q. No.Species A has 2n=12 and species B has 2n=18. What are the possible chromosome numbers that may be found in allotetraploids formed from species A and species B?
1. 27, 30, 33
2. 12, 18, 6
3. 9, 18, 27
4. 12, 18, 30
Subtopic: Non - Disjunction & Aneuploidy |
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During the biosynthesis of haemoglobin in sickle cell anaemic patients, CAC codon is transcribed to
1. GUG
2. GAG
3. CAC
4. CUC
1. GUG
2. GAG
3. CAC
4. CUC
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
69%
From NCERT
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Given below are two statements:
Statement I: Down's syndrome is a genetic disorder due to the presence of an additional copy
Statement II: The affected individual is short statured with small round head, is sterile and expresses Gynaecomastia
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but Statement II is true
Statement I: Down's syndrome is a genetic disorder due to the presence of an additional copy
Statement II: The affected individual is short statured with small round head, is sterile and expresses Gynaecomastia
In the light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but Statement II is true
Subtopic: Non - Disjunction & Aneuploidy |
70%
From NCERT
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Haemophilia is more commonly seen in human males than in human females because
1. It is a X-linked recessive disease
2. A greater proportion of girls die in infancy
3. It is a Y-linked recessive disease
4. It is a X-linked dominant disease
1. It is a X-linked recessive disease
2. A greater proportion of girls die in infancy
3. It is a Y-linked recessive disease
4. It is a X-linked dominant disease
Subtopic: Mendelian Disorders: Hemophilia |
86%
From NCERT
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Given below are two statements :
In light of the above statements, choose the correct answer from the options given below :
1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.
| Statement I: | Sickle cell anaemia and Haemophilia are autosomal dominant traits. |
| Statement II: | Sickle cell anaemia and Haemophilia are disorders of the blood. |
In light of the above statements, choose the correct answer from the options given below :
1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.
Subtopic: Mendelian Disorders: Hemophilia |
81%
From NCERT
NEET - 2022
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The chromosomal theory of inheritance was proposed by:
1. Thomas Morgan
2. Sutton and Boveri
3. Gregor Mendel
4. Robert Brown
1. Thomas Morgan
2. Sutton and Boveri
3. Gregor Mendel
4. Robert Brown
Subtopic: Chromosomal Basis of Inheritance: Introduction |
84%
From NCERT
NEET - 2022
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If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental development is retarded. The karyotype analysis of such an individual will show :
1. 47 chromosomes with XXY sex chromosomes
2. 45 chromosomes with XO sex chromosomes
3. 47 chromosomes with XYY sex chromosomes
4. Trisomy of chromosome 21
1. 47 chromosomes with XXY sex chromosomes
2. 45 chromosomes with XO sex chromosomes
3. 47 chromosomes with XYY sex chromosomes
4. Trisomy of chromosome 21
Subtopic: Non - Disjunction & Aneuploidy |
85%
From NCERT
NEET - 2022
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What is the expected percentage of F2 progeny with yellow and inflated pod in dihybrid cross experiment involving pea plants with green coloured, inflated pod and yellow coloured constricted pod ?
1. 100%
2. 56.25%
3. 18.75 %
4. 9%
1. 100%
2. 56.25%
3. 18.75 %
4. 9%
Subtopic: Dihybrid Cross Analysis |
54%
From NCERT
NEET - 2022
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Select the incorrect match regarding the symbols used in Pedigree analysis:
| 1. | .svg.svg) |
Sex unspecified |
| 2. | .svg.svg) |
Affected individual |
| 3. | .svg.svg) |
Consanguineous mating |
| 4. | .svg.svg) |
Parent with male child affected with disease |
Subtopic: Pedigree Analysis: Basics |
85%
From NCERT
NEET - 2022
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A normal girl, whose mother is haemophilic marries a male with no ancestral history of haemophilia. What will be the possible phenotypes of the offsprings?
Choose the most appropriate answer from the options given below:
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (d) only
4. (b) and (d) only
| (a) | Haemophilic son and haemophilic daughter. |
| (b) | Haemophilic son and carrier daughter. |
| (c) | Normal daughter and normal son. |
| (d) | Normal son and haemophilic daughter. |
1. (a) and (b) only
2. (b) and (c) only
3. (a) and (d) only
4. (b) and (d) only
Subtopic: Mendelian Disorders: Hemophilia |
74%
From NCERT
NEET - 2022
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