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A Mendelian experiment consisted of bree...

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as ……..... a. TTWW b. TTwW c. TtWW d. TtWw

A

TTWW

B

TTWW

C

TtWW

D

TtWw

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In peas, tallness is dominant over dwarfness and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers, the different phenotypic groups were obtained in the progeny in numbers mentioned against them : Tall, Red =138, Tall, White = 132 Dwarf, Red =136, Dwarf, White = 128 Mention the genotypes of the two parents and of the four offspring types.

Knowledge Check

  • When hybridisation is carried out between a tall (TT) pea plant and a short (tt) pea plant, all the plants (offsprings) show the expression of tallness, because ………………….... a.the expression of tallness is dominant. b.the expression of short is dominant. c.the expression of tallness is recessive. d.the character of tallness in pea plant is not controlled by gene T or t.

    A
    the expression of tallness is dominant.
    B
    the expression of short is dominant.
    C
    the expression of tallness is recessive.
    D
    the character of tallness in pea plant is not controlled by gene T or t.
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