15
Use the following information for Pea plants :
Dominant allele for tall plants – T
Recessive allele for short plants – t
Dominant allele for purple flowers – P
Recessive allele for white flowers – p
(a) Perform a cross between pure plant dominant for both the traits with another plant which is recessive for both the traits and work out the progeny upto $\text{F}_2$ generation.
(b) What is the probability of obtaining tall plants with white flowers in $\text{F}_2$ progeny?
Dominant allele for tall plants – T
Recessive allele for short plants – t
Dominant allele for purple flowers – P
Recessive allele for white flowers – p
(a) Perform a cross between pure plant dominant for both the traits with another plant which is recessive for both the traits and work out the progeny upto $\text{F}_2$ generation.
(b) What is the probability of obtaining tall plants with white flowers in $\text{F}_2$ progeny?
Show SolutionHide Solution↓
(a) Parents: TTPP (tall purple) x ttpp (short white)
Gametes: TP, tp
$F_1$: TtPp
Selfing of $F_1$: TtPp x TtPp (1 Mark)
$F_2$ gametes: TP, Tp, tP, tp.
Phenotypic ratio: tall and purple: 9, tall and white: 3, short and purple: 3, short and white: 1 (1 Mark)
(b) In $F_2$ progeny probability of Tall, White = 3/16 (1 Mark)
Gametes: TP, tp
$F_1$: TtPp
Selfing of $F_1$: TtPp x TtPp (1 Mark)
$F_2$ gametes: TP, Tp, tP, tp.
Phenotypic ratio: tall and purple: 9, tall and white: 3, short and purple: 3, short and white: 1 (1 Mark)
(b) In $F_2$ progeny probability of Tall, White = 3/16 (1 Mark)