The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called:

(1) Punnett square

(2) Net square

(3) Bullet square

(4) Punch square

Subtopic:  Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
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In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

1. 25%

2. 100%

3. 50%

4. 75%

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
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Experimental verification of the chromosomal theory of inheritance was done by:

(1) Sutton

(2) Boveri

(3) Morgan

(4) Mendel

Subtopic:  Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations |
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Select the correct match

1.  Phenylketonuria - Autosomal dominant trait

2.  Sickle cell anemia - Autosomal recessive trait chromosome - 11

3.  Thalassemia - X linked

4.  Haemophilia - Y linked

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
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Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.

1. A person will have only two of the 3 alleles.

2. When IA and IB are present together, they express same type of sugar.

3. Allele 'i' does not produce any sugar.

4. The gene (I) has three alleles. 

Subtopic:  Dominance Deviation from Mendel: 2 |
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How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

1. 2
2. 14
3. 6
4. 4

Subtopic:  Introduction to Genetics: 2 |
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Chromosomal theory of inheritance was proposed by :

1. Sutton and Boveri

2. Bateson and Punnet

3. T. H. Morgan

4. Watson and Crick

Subtopic:  Chromosomal Basis of Inheritance: Introduction | Chromosomal Basis of Inheritance: Further Considerations |
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The number of contrasting characters studied by Mendel for his experiments was :

1. 14

2. 4

3. 2

4. 7

Subtopic:  Introduction to Genetics: 2 |
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The best example of pleiotropy is:-

1. Skin color

2. Phenylketonuria

3. Colour Blindness

4. ABO Blood group

Subtopic:  Polygenic Inheritance & Pleiotropy |
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In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation  showed white, red, and pink flowers. Choose the incorrect statement from the following:

1. Law of Segregation does not apply in this experiment.
2. This experiment does not follow the Principle of Dominance.
3. The pink colour in F1  is due to incomplete dominance.
4. Ratio of  F2  is 1/4(red):2/4(pink):1/4(white).
Subtopic:  Dominance Deviation from Mendel: 1 |
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