# A farmer observe some pea plants in his garden some are tall and have round.some are balled and wrinkle seeds but he wants all pea plants to be tall and have round seeds if not all atleast 90./. of plants can he get all desirable characters or not?

1
by sanvy
should i go for the F1 progeny or F2?
coz. if i use F1 it's possible.

2015-02-22T21:36:39+05:30

if we take the parents  as , TTRR                                                      ttrr
Gamets are    TR  TR                                                tr  tr

F1 ----->    TR         TR
tr      TtRr      TtRr
tr      TtRr      TtRr
SO the phenotype wud be "ALL TALL AND ROUND"----------> 100% result

For the F2 progeny , gamets are   :  TR  Tr  tR  tr

F2----->       TR          Tr            tR          tr
TR      TTRR     TTRr     TtRR       TtRr
Tr       TTRr       TTrr      TtRR      Ttrr
tR       TtRR       TtRr       ttRR      ttRr
tr         TtRr        Ttrr        ttRr       ttrr

So, the phenotype : 9:3:3:1
9---Tall and Round
3---Tall and wrinkled
3---balled and Round
1---balled and wrinkled
Here the % of Tall and Round would be

So, he won't get 90% results if he goes for F2 progeny.