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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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Mention two differences between homozygous and heterozygous individuals.
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How many pairs of contrasting characters were studied by Mendel?
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Genes which code for a pair of contrasting traits are known as
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Distinguish between homozygous and heterozygous plants.
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If F1 hybrid shows characters of both the parents, then it is due to
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What is incomplete dominance? Explain it with reference to flower colour in snapdragon.
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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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Which chromosome of man has the least number of genes?
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Write the difference between Linkage and crossing over.

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State and explain Mendel's law of segregation with the help of a suitable cross.
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Why is a recessive allele unable to express itself in the heterozygous state?