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Q. No.Which one of the following disorders is caused by the substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule?
| 1. | Haemophilia | 2. | Thalassemia |
| 3. | Sickle-cell anaemia | 4. | Phenylketonuria |
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
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Match List-I with List-II:
Choose the correct answer from the options given below :
1. A-II, B-IV, C-III, D-I
2. A-I, B-III, C-II, D-IV
3. A-II, B-I, C-III, D-IV
4. A-I, B-IV, C-III, D-II
| List-I | List-II | ||
| A. | Incomplete dominance | I. | Human skin colour |
| B. | Co-dominance | II. | Inheritance of flower colour in Antirrhinum sp. |
| C. | Pleiotropy | III. | Phenylketonuria disease in humans |
| D. | Polygenic inheritance | Iv. | ABO blood groups |
Choose the correct answer from the options given below :
1. A-II, B-IV, C-III, D-I
2. A-I, B-III, C-II, D-IV
3. A-II, B-I, C-III, D-IV
4. A-I, B-IV, C-III, D-II
Subtopic: Miscellaneous |
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Which of the following statements are true with reference to the sex-determination in honeybees?
Choose the correct answer from the options given below:
| A. | An offspring formed from the union of a sperm and an egg, develops as a female (queen or worker). |
| B. | An unfertilized egg develops as a male by parthenogenesis. |
| C. | A male has half the number of chromosomes than that of a female. |
| D. | Males produce sperm by meiosis. |
| E. | Honeybees have a haplodiploid sex-determination system. |
| 1. | B, C, D and E only | 2. | A, B, C and D only |
| 3. | A, B, D and E only | 4. | A, B, C and E only |
Subtopic: Sex Determination |
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The sixth mutant codon of beta globin gene causing polymerization of Haemoglobin and change in RBC shape is _____.
1. CAG
2. GUG
3. AUG
4. GAG
1. CAG
2. GUG
3. AUG
4. GAG
Subtopic: Mendelian Disorders: Sickle Cell Anemia |
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What is the probability of having children with 'O' blood group, where both mother and father are heterozygous for 'A' and 'B' blood group, respectively ?
| 1. | 50% |
| 2. | 0% |
| 3. | 75% |
| 4. | 25% |
Subtopic: Polygenic Inheritance & Pleiotropy |
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In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in this species are __________.
1. all males
2. all females
3. females and males, respectively
4. males and females, respectively
1. all males
2. all females
3. females and males, respectively
4. males and females, respectively
Subtopic: Sex Determination |
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In which animal do haploid cells divide mitotically to produce gametes?
| 1. | Male honeybees | 2. | Male grasshoppers |
| 3. | Male earthworms | 4. | Male frogs |
Subtopic: Sex Determination |
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What is the pattern of inheritance for polygenic traits?
| 1. | Autosomal dominant pattern |
| 2. | X-linked recessive inheritance pattern |
| 3. | Mendelian inheritance pattern |
| 4. | Non-Mendelian inheritance pattern |
Subtopic: Polygenic Inheritance & Pleiotropy |
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With the help of the given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in \(F_3\) generation.
| 1. | 1/8 | 2. | Zero |
| 3. | 1/4 | 4. | 1/2 |
Subtopic: Pedigree Analysis: Problem Solving |
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Genes R and Y follow independent assortment. If RRYY produce round yellow seed and rryy produce wrinkled green seeds, what will be then phenotypic ratio of the F2 generation?
1. Phenotypic ratio - 9 : 3 : 3 : 1
2. Phenotypic ratio - 9 :7
3. Phenotypic ratio - 1 : 2 : 1
4. Phenotypic ratio - 3 : 1
1. Phenotypic ratio - 9 : 3 : 3 : 1
2. Phenotypic ratio - 9 :7
3. Phenotypic ratio - 1 : 2 : 1
4. Phenotypic ratio - 3 : 1
Subtopic: Dihybrid Cross Analysis |
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