Heredity and Variation(Mendelian Inheritance; Deviations from Mendelism Incomplete dominance, Co-dominance, Multiple alleles and Inheritance of blood groups, Pleiotropy...) NEET Questions

Biology - Genetics and Evolution

Heredity and Variation(Mendelian Inheritance; Deviations from Mendelism Incomplete dominance, Co-dominance, Multiple alleles and Inheritance of blood groups, Pleiotropy...) MCQ Questions


7.
Mendel's Law of Independent Assortment applies to genes located on:
A.
Mitochondrial DNA
B.
The same chromosome closely
C.
Different chromosomes or far apart on the same chromosome
D.
Sex chromosomes only
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ANSWER :
C. Different chromosomes or far apart on the same chromosome
8.
A test cross is performed between an organism of unknown genotype and a:
A.
F1 hybrid
B.
Homozygous recessive individual
C.
Homozygous dominant individual
D.
Heterozygous individual
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ANSWER :
B. Homozygous recessive individual
9.
In a test cross, if the offspring show 1:1 ratio, the unknown parent is:
A.
Homozygous dominant
B.
Hemizygous
C.
Homozygous recessive
D.
Heterozygous
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ANSWER :
D. Heterozygous
10.
The reciprocal cross gives identical results to the original cross when the gene is located on:
A.
Autosomes
B.
X chromosome
C.
Y chromosome
D.
Mitochondrial DNA
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ANSWER :
A. Autosomes
11.
Pure line refers to organisms that are:
A.
Heterozygous and true breeding
B.
Hybrid and uniform
C.
Genetically variable
D.
Homozygous and true breeding
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ANSWER :
D. Homozygous and true breeding
12.
The phenotypic ratio in a back cross of F1 with homozygous dominant parent is:
A.
3:1
B.
1:1
C.
All dominant phenotype
D.
9:3:3:1
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ANSWER :
C. All dominant phenotype