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What are the basic units of heredity?

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Important Questions on Principles of Inheritance and Variation

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Mention two differences between homozygous and heterozygous individuals.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
How many pairs of contrasting characters were studied by Mendel?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Genes which code for a pair of contrasting traits are known as
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Distinguish between homozygous and heterozygous plants.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Mention one cause of frameshift mutation. 
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation

Explain the following term:

Allele.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Morgan's experiments were on
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Define heterozygous.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Monohybrid cross is a cross of ________.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
If F1 hybrid shows characters of both the parents, then it is due to
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
What is incomplete dominance? Explain it with reference to flower colour in snapdragon.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Choose the correct statement
I) Alleles are unable to blend with other.
II) Genes are units of inheritance and alleles are slightly different forms of the same genes.
III) Mendel laws could be able to provide physical proof for the existence of genes (factors).
IV) Genes occurs in pairs and one pair segregate independently of another pair.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Which chromosome of man has the least number of genes?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation

Write the difference between Linkage and crossing over.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Define homozygous.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
State and explain Mendel's law of segregation with the help of a suitable cross.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Select the incorrect match.
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation

Name the scientist who coined the term 'linkage'.

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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Why is a recessive allele unable to express itself in the heterozygous state?
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Biology>Genetics and Evolution>Principles of Inheritance and Variation>Heredity and Variation
Alleles are: