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(i) Why are two letters (such as TT, Tt,...

(i) Why are two letters (such as TT, Tt, tt) used to denote the character of height?
(ii) If a purple pea plant (PP) is crossed with a white coloured pea plant (pp), will we have white flowered pea plant in the F, generation? Why?
(iii) Define dominant and recessive traits.

Text Solution

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(i) This is to show that each trait is influenced by both paternal and maternal DNA.
(ii) No.
This is because all the `F_(1)` progeny plants show the genetic makeup `P_(P)`, which results in purple flowers.
(iii) Dominant trait is a genetic trait that is expressed in a person who has only one copy of that gene.
Recessive trait is a genetic trait that is expressed only when two copies of the gene are present.
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