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Principles Of Inheritance And Variation

Question

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List the main points of chromosome theory of inheritance.

Solution

Chromosome theory of inheritance staes that

1.Chromosomes and genes are found in pairs in diploid cells.

2. Both chromosomes and genes segregate in meiosis I.

3. Each gamete receives only one chromosome and one allele of the gene pair.

4. Paired condition of both is restored during fertilization.

5. Both chromosomes and genes retain their individuality throughout life cycle.

Some More Questions From Principles of Inheritance and Variation Chapter

Write down Mendel’s dihybrid Phenotypic ratio

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

What is the unique feature of F1 generation ?

What will be the genetic make up of an organism which suffers from sickle cell anaemia ?

What do the symbols square and circle in a pedigree chart indicate ?

Define heterogamy. Give an example.

How many chromosomes are found in human cells ?

Why is male Drosophila regarded as heterogametic ?

What term is used for the two chromatids resulting from the interchange of segments during crossing over ?

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