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Principles Of Inheritance And Variation

Question

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If root of a flowering plant has 24 chromosomes, then its gamete has how many chromosomes?

24

12

4

8

Solution

B.

12

The root cell of flowering plant is diploid (2n = 24) while the gamete is haploid, therefore, the number of chromosomes becomes 12 in the gamete.

The cells of stem, leaf and somatic cells of flower are diploid, therefore, they contain the chromosome number 2n = 24.

Some More Questions From Principles of Inheritance and Variation Chapter

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 ?

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 ?

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