Home
Class 12
BIOLOGY
Give a pure genetic explanation for the ...

Give a pure genetic explanation for the following cross, when a tall pea plant with round seeds was crossed with a pea plant that is dwarf having wrinkled seeds. Individuals of `F_(1)` population were all tall having round seeds . However , selfing among `F_(1)` population led to a 9 : 3 : 3 : 1 phenotypic ratio

Text Solution

Verified by Experts

The cross given in question is a dihybrid cross, which explains the third law of Mendel, i.e. law of independent assortment . Thus was based on the results of dihybrid crosses, where inheritance of two traits were considered simulataneously. This law states that when two pairs of traits are combined in a hybrid , segregation of one pair of character is independent of the other pair of characters at the time of gamete formation. It also gets randomly rearranged in the offspring producing both parental and new combinations of characters .

Phenotypic ratio Tall and round : Tall and winkled : Dwarf and round : Dwarf and wrinkled 9 : 3 : 3 : 1
Genotypic ratio 1 : 2 : 2 : 4 : 1 : 2 : 1 : 2 : 1
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • VERY SIMILAR TEST 3

    ARIHANT PRAKASHAN|Exercise Section B (Zoology) Group A |10 Videos

  • VERY SIMILAR TEST 3

    ARIHANT PRAKASHAN|Exercise Section B (Zoology) Group B|9 Videos

  • VERY SIMILAR TEST 3

    ARIHANT PRAKASHAN|Exercise Section A (Botany) Group B |9 Videos

  • SEXUAL REPRODUCTION IN FLOWERING PLANT

    ARIHANT PRAKASHAN|Exercise CHAPTER TEST |20 Videos

  • VERY SIMILAR TEST 1

    ARIHANT PRAKASHAN|Exercise Section - B (Zoology)|26 Videos

Similar Questions

Explore conceptually related problems

When a pure strain of tall plants (TT) with round seeds (RR) is crossed with a pure strain of short plants (tt) with wrinkled seeds (rr), an F_(1) generation is produced. The alleles for short and wrinkled are recessive to those for tall and round, respectively. When these F_(1) plants self-pollinate, what proportion of the F_(2) generation is short with wrinkled seeds ?

When a hybrid tall pea plant is cross fertilized with a dwarf pea plant,the ratio of tall to dwarf plants grown from the seeds will be:

Knowledge Check

  • When a tall plant with round seeds (TTRR) crossed with a dwarf plant with a dwarf plant with wrinkle seeds(ttrr),the underset

    A
    0.25
    B
    (1/16)
    C
    0
    D
    (1/2)

  • If a plant having yellow and round seeds was crossed with another plant . having green and wrinkled seeds then F_1 -progeny are in the ratio :

    A
    `15:1`
    B
    `1:15`
    C
    `1:13`
    D
    All yellow & round seeds

  • When a hybrid tall pea plant is cross fertilized with a dwarf pea plant , the ratio of tall is to dwarf plants grown from the seeds will be :

    A
    3 : 1
    B
    2 : 1
    C
    1 : 3
    D
    1 : 1

    • Similar Questions

    Explore conceptually related problems

    When a tall plant with round seeds ( TTRR ) crossed with a dwarf plant with wrinkled seeds ( ttrr ) , the F_1 generation consists of tall plant with round seeds . What would be the proportion of dwarf plant with wrinkled seeds in F_1 -generation ?

    When a hybrid tall pea is cross fertilized by a pure dwarf the ratio of tall to dwarf grown from the seeds will be:

    When heterozygous round seeded plant is crossed with a recessive wrinkle seeded plant and round and wrinkle phenotypes will appear in F_1 in the ratio :

    When tall and dwarf plants are crossed , from which cross 1 : 1 ratio is obtained ?

    When heterozygous round seeded plant is crossed with a recessive wrinkled seeded plant and and wrinkle phenotypes will appear in underset(1)(F) in the ratio:

    Home
    Profile