In which of the following one may observe variation in DNA?

(1) Fragmentation

(2) Budding

(3) Amitosis

(4) mutation

Subtopic:  Mendelian Disorders |
 95%
From NCERT
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If a normal female has a sickle cell anaemic child what can be the probable genotype of that gene in that female?

(1) AA

(2) aa

(3) Aa

(4) both (1) and (3)

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
 65%
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If the female has three boys in her first three pregnancy. What are the chances of getting female child this time?

(1) 25%

(2) 50%

(3) 75%

(4) 20%

Subtopic:  Dihybrid Cross: Details |
 88%
From NCERT
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If a haemophilic female who marries a normal male gives birth to a male child, then what are the chances of boy being normal? (a hypothetical situation but it won’t happen practically)

 (1) 0%

 (2) 50 %

 (3) 25%

 (4) 75%

Subtopic:  Mendelian Disorders: Hemophilia |
 72%
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In ABO blood grouping how many genotypes show co-dominance? 

(1) 1

(2) 2

(3) 3

(4) 4

Subtopic:  Dominance Deviation from Mendel: 2 |
 58%
From NCERT
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Pedigree analysis is not utilized to trace

(1) Specific trait

(2) Sex ratio

(3) Disease

(4) Abnormality

Subtopic:  Pedigree Analysis: Basics |
 78%
From NCERT
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Which of the following symbols represent consanguineous mating? 

(1)

(2)

(3)

(4)

Subtopic:  Pedigree Analysis: Basics |
 89%
From NCERT
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In the given pedigree chart select the correct statement:

(1) A & B are twins

(2) A is younger than B

(3) B is younger than A

(4) Can’t determine the age of A & B

Subtopic:  Pedigree Analysis: Problem Solving |
From NCERT
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Which of the following is the sex linked disease? 

(1) Sickle cell anaemia

(2) Haemophilia

(3) Cystic fibrosis

(4) Phenylketonuria

Subtopic:  Mendelian Disorders: Hemophilia |
 90%
From NCERT
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Mendelian disorders are caused by

(1) Mutation in the single chromosome

(2) Mutation in the single gene

(3) Polyploidy

(4) Aneuploidy

Subtopic:  Mendelian Disorders |
 74%
From NCERT
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