Repeated crosses between two tall plants resulted in all tall offspring. What, most likely, would be the genotypes of both parents?
1. tt X tt
2. Tt and Tt
3. TT and TT
4. Tt and tt
Subtopic:  Monohybrid Cross: Further Understanding |
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Which of the following was not a character studied by Mendel in garden pea?

1. Flower position 2. Pod shape
3. Flower colour 4. Pod position

Subtopic:  Introduction to Genetics: 1 | Introduction to Genetics: 2 | Monohybrid Cross: 1 |
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Consider the given two statements:
Assertion (A):  Mendel self-pollinated the F2 plants and found that dwarf Fplants continued to generate dwarf plants in F3 and F4 generations.
Reason (R):  The genotype of the dwarfs was homozygous.
 
1.  Both (A) and (R) are True but (R) does not correctly explain (A).
2.  Both (A) and (R) are True and (R) correctly explains Assertion.
3.  Both (A) and (R) are False.
4.  (A) is True but (R) is False.
Subtopic:  Monohybrid Cross: Further Understanding |
 62%
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Consider the given two statements:
Assertion (A): The strength of linkage between two genes is directly proportional to the distance between them on the chromosome.
Reason (R):  Genes that are farther apart are less likely to be separated by recombination.
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False, (R) is False.
Subtopic:  Linkage |
 59%
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Consider the given two statements:
Assertion (A): Although there are three alleles for the ABO blood group types in humans, an individual is expected to carry only two of any such alleles.
Reason (R): To study multiple allelism, the geneticist must study the population and not an individual.
  
1. (A) is False but (R) is True.
2. Both (A) and (R) are True and (R) is the correct explanation of (A).
3. Both (A) and (R) are True but (R) is not the correct explanation of (A).
4. (A) is True but (R) is False.
Subtopic:  Polygenic Inheritance & Pleiotropy |
 70%
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In a monohybrid cross, ¼ of the random fertilisations lead to:
I: Homozygous dominant progeny
II: Homozygous recessive progeny
III: Heterozygous progeny
 
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic:  Monohybrid Cross: Further Understanding |
 70%
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Consider the given two statements: 
Assertion (A): In a Mendelian monohybrid cross, the F2 generation exhibits a phenotypic ratio of 3:1. 
Reason (R): This ratio occurs because alleles segregate independently during gamete formation and recombine randomly during fertilization.
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A)
2. Both (A) and (R) are True but (R) is not the correct explanation of (A)
3. (A) is True but (R) is False. 
4. (A) is False but (R) is True.
Subtopic:  Monohybrid Cross: 1 |
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The mode of inheritance of given pedigree is best explained as:
1. Autosomal dominant 2. Autosomal recessive
3. Sex linked dominant 4. Sex linked recessive
Subtopic:  Sex Linked Recessive Inheritance |
 73%
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Consider the given two statements:
I: Gregor Mendel, conducted hybridisation experiments on garden peas for seven years (1856-1863).
II: During Mendel’s investigations into inheritance patterns, it was for the first time that statistical analysis and mathematical logic were applied to problems in biology.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic:  Introduction to Genetics: 1 |
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Identify an autosomal recessive inborn error of metabolism the effects of which can be completely overcome by regulating the diet of the affected individual:

1. Cystic fibrosis 2. Huntington’s chorea
3. Albinism 4. Phenylketonuria
Subtopic:  Mendelian Disorders |
 75%
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