Two phenotypically normal individuals have an affected child. What can we conclude about the parents?

1. they both carried the diesease allele

2. they are not the parents of the child

3. they are affected

4. no conclusions can be drawn

Subtopic:  Mendelian Disorders |
 86%
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What is the basis of pleiotropy?

1. A spontaneous mutation during the replication of DNA.

2. Interrelationship between various metabolic pathways in the body.

3. Chromosomal aberration as chromosomes are the vehicles of genes.

4. the behaviour of chromosomes during meiosis or gamete formation.

Subtopic:  Polygenic Inheritance & Pleiotropy |
 55%
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A female whose father was colorblind marries and normal male whose father was also colorblind. What is the probablility that their daughter will be colorblind?

1. 0 %

2. 25 %

3. 50 %

4. 75 %

Subtopic:  Sex Linked Recessive Inheritance |
 58%
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In humans, the dominance relationship between the A and B alleles of ABO blood group gene is an example of

(1) complete dominance.

(2) incomplete dominance.

(3) codominance.

(3) epistasis

 

Subtopic:  Dominance Deviation from Mendel: 2 |
 85%
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One of the Mendel's pure strains of pea plants had green peas. How many different types of eggs could such a plant produce with regard to pea color?

1. 1

2. 2

3. 4

4. 8

Subtopic:  Monohybrid Cross: 1 |
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A woman receives her X chromosomes from:

1. Her mother only

2. Her father only

3. Both her mother and father 

4. Mitochondria of mother only

 

Subtopic:  Sex Determination |
 82%
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Which one from those given below is the period of Mendel's hybridisation experiments?

(1) 1856 - 1863

(2) 1840 - 1850

(3) 1857 - 1869

(4) 1870 - 1877

Subtopic:  Introduction to Genetics: 2 |
 91%
From NCERT
NEET - 2017
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Among the following characters, which one was not considered by Mendel in his experiments on pea?

(1) Stem - Tall or Dwarf

(2) Trichomes - Glandular or Non-glandular

(3) Seed - Green or Yellow

(4) Pod - Inflated or Constricted

Subtopic:  Introduction to Genetics: 2 |
 95%
From NCERT
NEET - 2017
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Thalassemia and sickle-cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

(1) Both are due to a qualitative defect in globin chain synthesis

(2) Both are due to a quantitative defect globin chain synthesis

(3) Thalassemia is due to less synthesis of globin molecules

(4) Sickle-cells anaemia is due to a quantitative problem of globin molecules

Subtopic:  Mendelian Disorders: Thalassemia |
 68%
From NCERT
NEET - 2017
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A disease caused by an autosomal primary non-disjunction is 

(1) Down's syndrone

(2) Kilnerfelter's syndrome

(3) Turner's syndrome

(4) Sickle-cell anemia

Subtopic:  Non - Disjunction & Aneuploidy |
 59%
NEET - 2017
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