MCQ on Genetics

1. What are Alleles?
a) Linked genes
b) Alternative forms of a gene
c) Homologous chromosomes
d) Chromosome that have crossed over

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b) Alternative forms of a gene

2. Mendel chooses pea plants for his experiments because:
a) They were having contrasting characters
b) They were cheap
c) They were easily available
d) All of the above

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a) They were having contrasting characters

3. When a heterozygous offspring is crossed with homozygous recessive parent, it is called:
a) Test cross
b) Reciprocal cross
c) Monohybrid cross
d) Dihybrid cross

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a) Test cross

4. The term genome is used for what?
a) Haploid set of a chromosome
b) Diploid set of chromosome
c) Polyploid set of chromosome
d) Triploid set of chromosome

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b) Diploid set of chromosome




5. An organism with two identical allele of a gene in a cell is called:
a) Homozygous
b) Heterogeneous
c) Hybrid
d) Dominant

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a) Homozygous

6. What is the smallest unit of genetic material which when mutated produces a phenotypic effect ?
a) Recon
b) Muton
c) Gene
d) Nucleic acid

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a) Recon

7. Which among the following is not a model organism in genetic analysis?
a) The Zebra fish
b) The plant Arabidopsis thaliana
c) The mouse deer
d) The nematode Caenorhabditis elegans

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c) The mouse deer

8. In DNA, adenine normally pairs with
a) Cytosine
b) Guanine
c) Thymine
d) Uracil

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c) Thymine

9. What is refers to Positional cloning?
a) Using a selection procedure to clone a cDNA
b) Cloning a portion of a gene using PCR
c) Isolating a gene by PCR using primers from another species
d) Mapping a gene to a chromosomal region and then identifying and cloning a genomic copy of the gene from the region

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d) Mapping a gene to a chromosomal region and then identifying and cloning a genomic copy of the gene from the region

10. A gene showing codominanace -
a) Has one allele dominant to the other
b) Has both alleles independently expressed in the heterozygote
c) Has alleles tightly linked on the same chromosome
d) Has alleles expressed at the same time in development

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b) Has both alleles independently expressed in the heterozygote




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