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ln plant gene ‘A’ is responsible for tal...

ln plant gene ‘A’ is responsible for tallness and its recessibe allele 'a’ for ariness and 'B' is responsible for red colour to recessive allele 'b' for hite flower colour. A tall and red flowered plant with genotype Aabb crossed with dwarf and red flowers (aaBb). What is the percentage of dwarf white flowered off spring of above cross?

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If a homozygous red flowered plant is crossed with a homozygous white flowered palnt then the following will be:

If four o' clock plants, the gene for red flower colour (R) is incompletely dominant over the gene for white flower colour (r), hence the plants heterozygous for flower colour (Rr) have pink flower. What will be the ratio of offsprings in a cross between the red flowers and pink flowers ?

Knowledge Check

  • (i) Read the following content and answer the question below : Pure-bred tall pea plants are first crossed with pure-bred dwar pea plant. The pea plants obtained in F_1 generation are then cross-bred to produce F_2 generation of pea plants. (a) What do the plants of F_1 generation look like ? (b) What is the ratio of tall plants to dwarf plants if F_2 generation? (c ) Which type of plants were missing in F_1 generation but reppeared in F_2 generation? (ii) Why is the sino-atrial node called the pacemaker of heart ?

    A
    both correct
    B
    assertion only right
    C
    reason only right
    D
    both wrong

    • Similar Questions

    Explore conceptually related problems

    When 4 O' clock plant with red flower is crossed with white flower, the F_1 plant produces pink flower. What is this type of inheritance? Explain the inheritance at the molecular level.

    A plant with red flowers was crossed with another plant of the same species with white flowers. The offspring thus obtained were 60 plants with only pink flowers. On selfing, these plants produced 60 plants with red flowers, 120 plants with pink flowers and 60 with white flowers. a. Name the genetic principle behind this. b. Give scientific explanation for this. " c. Name the geneticist who conducted this experiment.

    A yellow colour flower plant indicated by YY is crossed with white color flower plant denoted by yy. (a) following the Mendelian inheritance pattern , what would be the flower color is first filial generation ? (b) Which Mendelian principle is illustrated in this cross ? (c) Derive the cross and state the phenotypic ratio of yellow flowers to white flowers in F_2 generation ?

    When a cross is made between tall plant with yellow seed (TtYy) and tall plant with green seed (Ttyy), what proportions of phenotype in the offspring could be expected to be a. tall and green. b.dwarf and green.

    To find out the unknown genotype of a violet flowered pea plant a researcher done the following cross. Observe the diagram and answer the following questions. a. What would be the above cross called ? b. Can you determine the unknown genotype of violet flowered parent by drawing Punnet swuare ?

    (i) Read the following content and answer the questions below: Pure-bred tall pea plants are first crossed with pure-bred dwarf pea plants. The pea plants obtained in F_1 eneration are then cross-bred to produce F_2 generation of pea plants. (a) What do the plants of F_1 generation look like? (b) What is the ratio of tall plants to dwarf plants in F_1 generation? (c) Which type of plants were missing in F_1 generation but reappeared in F_2 generation? (ii) Why is the sino-atrial mode called the pacemaker of heart ?

    Assertion : The pink coloured flowers appear in F_(2) generation of plant Mirabilis jalapa Reason : This is observed due epistatic suppression of white colour alleles in one of parental flowers by red colour alleles

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