Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:

1.Aneuploidy2.Polyploidy
3.Allopolyploidy4.Monosomy

Subtopic:  Non - Disjunction & Aneuploidy |
 76%
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If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is:

1.Autosomal dominant2.Autosomal recessive
3.Sex-linked dominant4.Sex-linked recessive

Subtopic:  Sex Linked Recessive Inheritance |
 75%
From NCERT
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In a certain taxon of insects, some have 17 chromosomes and others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are:

1. males and females, respectively

2. females and males, respectively

3. all males

4. all females

Subtopic:  Sex Determination | Sex Determination: Further Considerations |
 79%
From NCERT
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The inheritance pattern of a gene over generations among humans is studied by pedigree analysis. The character studied in the pedigree analysis is equivalent to:

1.quantitative trait2.Mendelian trait
3.polygenic trait4.maternal trait

Subtopic:  Pedigree Analysis: Basics |
 82%
From NCERT
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It is said that Mendel proposed that the factor controlling any character is discrete and independent. His proposition was based on the:
 

1. results of the F3 generation of a cross
2. observations that the offspring of a cross made between the plants having two contrasting characters shows only one character without any blending
3. self-pollination of F1 offspring
4. cross-pollination of F1 generation with recessive parent
Subtopic:  Monohybrid Cross: 1 |
 68%
From NCERT
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In a plant, red fruit (R) is dominant over yellow fruit (r), and tallness (T) is dominant over shortness (t). A plant with RRTt genotype is crossed with a plant of rrtt genotype. The progeny is:
1. All red fruit, tall 25%
2. All red fruit, tall 50%
3. All red fruit and tall 75%
4. All red fruit and tall.

Subtopic:  Dihybrid Cross: Details |
 78%
From NCERT
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Which of the following is the most suitable medium for the culture of Drosophila melanogaster?

1. Cow dung 2. Moist bread
3. Agar agar 4. Ripe Banana
Subtopic:  Chromosomal Basis of Inheritance: Introduction | Linkage |
 65%
From NCERT
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A human male produces diallelic sperms in equal proportion AB, Ab, aB, and ab. The genotype of the person would be:

1.Aa Bb2.Aa BB
3.AA Bb4.AA BB.

Subtopic:  Dihybrid Cross: Details |
 91%
From NCERT
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The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because “O” in it refers to having:

1. No anitgens A and B on RBCs
2. Other antigens besides A and B on RBCs
3. Overdominance of this type on the genes for A and B types
4. One antibody only - either anti-A or anti-B on the RBCs
Subtopic:  Dominance Deviation from Mendel: 1 |
 88%
From NCERT
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A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-
blind. They have their first child as a daughter. What are the chance that this child would be colour–blind?

1.100%2.zero percent
3.25%4.50%

Subtopic:  Sex Linked Recessive Inheritance |
 67%
From NCERT
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