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Q. No.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
Subtopic: Non - Disjunction & Aneuploidy |
84%
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 |
53%
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 |
84%
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 |
73%
From NCERT
NEET - 2022
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The diagram shows two possible arrangements of homologues at metaphase equatorial plate during meiosis and the resultant gametic combinations. This is the physical basis of:
| 1. Segregation | 2. Independent assortment |
| 3. Multiple allelism | 4. Pleiotropy |
Subtopic: Chromosomal Basis of Inheritance: Further Considerations |
74%
From NCERT
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The given diagram shows:
1. Exchange of segments between non-sister chromatids of homologous chromosomes during prophase I of first meiosis.
2. Exchange of segments between non-sister chromatids of heterologous chromosomes during prophase I of first meiosis.
3. Reciprocal translocation where there is an exchange of segments between heterologous chromosomes and it is a chromosomal aberration.
4. Inversion, a chromosome aberration, due to non-disjunction of homologues at first meiosis.
Subtopic: Non - Disjunction & Aneuploidy | Mutation |
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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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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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Which one of the following pairs of genotype and phenotype ratios will be obtained in F2 generation for Snapdragon plants exhibiting incomplete dominance for red and white flower color traits?
1. 3:1 and 1:2:1
2. 1:2:1 and 3:1
3. 3:1 and 3:1
4. 1:2:1 and 1:2:1
1. 3:1 and 1:2:1
2. 1:2:1 and 3:1
3. 3:1 and 3:1
4. 1:2:1 and 1:2:1
Subtopic: Monohybrid Cross: Further Understanding |
61%
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 |
87%
From NCERT
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