The term "linkage" was coined by :-

1. TH Morgan

2. T Boveri

3. G Mendel

4. W Sulton

Subtopic:  Linkage |
 90%
From NCERT
NEET - 2015
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In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree

1. Autosomal dominant

2. X-linked recessive

3. Autosomal recessive

4. X-linked dominant

Subtopic:  Pedigree Analysis: Problem Solving |
NEET - 2015
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A pleiotropic gene

1.   is expressed only in primitive plants

2.   is a gene involved during Pliocene

3.  controls a trait only in combination with another gene

4.   control multiple traits in an individual

Subtopic:  Polygenic Inheritance & Pleiotropy |
 88%
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NEET - 2015
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Multiple alleles are present 

1. on different chromosomes

2. at different loci on the same chromosome

3. at the same locus of the chromosome

4. on non-sister chromatids

Subtopic:  Dominance Deviation from Mendel: 2 |
NEET - 2015
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An abnormal human baby with 'XXX' sex chromosomes was born due to

1. formation of abnormal sperms in the father

2. formation of abnormal ova in the mother

3. fusion of two ova and one sperm

4. fusion of two ova and two sperm

Subtopic:  Non - Disjunction & Aneuploidy |
NEET - 2015
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Alleles are

1. different phenotype

2. true breeding homozygotes

3. different molecular forms of a gene

4. heterozygotes

Subtopic:  Monohybrid Cross: 1 |
 79%
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NEET - 2015
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Fruit color in squash is an example of 

(1) recessive epistatis

(2) dominant epistatis

(3) complementary genes

(4) inhibitory genes

Subtopic:  Epistasis |
 56%
NEET - 2014
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A human female with turner's syndrome

(1) has 45 chromosomes with XO

(2) has one additional X-chromosome

(3) exhibits male characters

(4) is able to produce children with normal husband

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 84%
From NCERT
NEET - 2014
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Which of the following statements is not true of two genes that show 50% recombination frequency?

(1) the genes may be on different chromosomes 

(2) the genes are tightly linked

(3) the genes show independent assortment

(4) If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis

 

Subtopic:  Recombination Gene Mapping |
 54%
From NCERT
NEET - 2013
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If two persons 'AB' blood group marry and have sufficiently large number of children, these children could be classified as 'A' blood group : 'AB' blood group : 'B' blood group in 1 : 2 : 1 ratio. Modern technique of protein electrophoresis reveals presence of both 'A' and 'B' type proteins in 'AB' blood group individuals. This is an example of

(1) codominance

(2) incomplete dominance

(3) partial dominance

(4) complete dominance 

Subtopic:  Dominance Deviation from Mendel: 2 |
 88%
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NEET - 2013
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