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Question

If a plant is heterozygous tall and produced tall as well as dwarf in F2 generation, it represents the law of

A
Dominance
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B
Purity of gametes
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C
Independent assortment
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D
Free recombination
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Solution

The correct option is B Purity of gametes

A.Dominance – In a pair of contrasting characters, one character is expressed and another character is not expressed. The expressed character is called Dominant character and not expressed character is called recessive character. This is called Law of dominance. It is the first law of Mendel’s.

B.purity of gametes - During gamete formation, the alleles for each gene segregate from each other so that each gamete carries only one allele for each gene. Law of independent assortment. Genes for different traits can segregate independently during the formation of gametes. Due to this in the F2 generation, 3:1 ratio of tall and dwarf progeny are formed.

C.Independent assortment - when two or more characteristics are inherited, individual hereditary factors assort independently during gamete production, giving different traits an equal opportunity of occurring together.

D.Free recombination – appearance of new characters in the progeny is called recombination.

If a plant is heterozygous tall and produced tall as well as dwarf in F2 generation, it represents the law of purity of gametes.

So, the correct option is ‘Purity of gametes’.

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