Question

What will be the genotype of a tall plant which in self crossing produce a dwarf plant

Answer 1

Answer:

Height in pea plant is determined by two alleles, T and t. Pure tall plants have genotype TT while pure dwarf has genotype tt.

Here the F  

1

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 generation has a genotype of Tt ( heterozygous ). Allele T is dominant over t and result in all the 'Tt' offspring as tall. Dominance is the condition in which the effect on the phenotype of one allele masks the contribution of a second allele at the same locus. The first allele is dominant and the second allele is recessive.

F  

2

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 generation has offspring as TT, Tt and tt in the ration of 1:3:1. As we can see again, allele 'T' is dominant in case of the heterozygous condition.

So, the correct option is 'Dominance'.

Explanation: