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Principles Of Inheritance And Variation

Question

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A male honeybee has 16 chromosomes whereas its female has 32 chromosomes. Give one reason.

Solution

Male honeybees are born from unfertilised eggs by the process known as parthenogenesis where as female honeybees are born from fertilised eggs. As unfertilised eggs carries only half number of chromosome as compared to fertilised eggs, therefore male honeybee has 16 chromosomes whereas female has 32 chromosomes.

Some More Questions From Principles of Inheritance and Variation Chapter

Give one example of genetic trait for each of the following in humans : (i) Lethality (ii) Multiple allelism.

What for symbols AA and Aa stand ?

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

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 ?

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