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Brown (y^+) is dominant over yellow body...

Brown `(y^+)` is dominant over yellow body colour (y) and red eyes `(w^+)` is dominant over white eyes (w). Both are carried on X chromosome. What is the genotype of a male Drosophila fly that has yellow body colour and red eyes?

A

`X^(w+y)Y`

B

`X^(wy)Y`

C

`X^(wy+)Y`

D

`X^(wy+)X^(wy+)Y`

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Knowledge Check

  • In Mendel's garden peas, the tall allele (D) is dominant over the dwarf allele (d) and the green pod allele is dominant (Y) over the yellow pod allele (Y). What is the genotype of a heteroxygous tall, Homoxygous green pod pea plant?

    A
    DdYy
    B
    DDYY
    C
    DdYY
    D
    DDYy

  • In a certain plaint, yellow fruit column (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes. Identify the outcome of this particular cross when a plant with genotype YyRr is back-crossed with the double recessive parent?

    A
    `9:3:3:1` ratio of phenotypes only
    B
    `9:3:3:1` ratio of genotypes only
    C
    `1:1:1:1` ratio of phenotypes only
    D
    `1:1:1:1` ratio of phenotypes and genotypes

  • Read the given paragraph to answer In a certain plant, yellow fruit colour (Y) is dominant to green fruit colour (y) and round shape (R) is dominant to oval shape (r). The two genes involved are located on different chromosomes. Which of the following will result when plant YyRr is self-pollinated ?

    A
    `9 : 3 : 3: 1` ratio of phenotypes only
    B
    `9 : 3 : 3: 1` ratio of genotypes only
    C
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    D
    `1:1:1:1` ratio of phenotypes and genotypes