Drosophila females of wild type red eye appearance and normal wing length are cr

Question

Drosophila females of wild type red eye appearance and normal wing length are crossed with males showing two autosomal recessive traits: purple eyes and vestigial wings. What does the following data show? Number of offspring per phenotypic class:

Wild type 441

Purple eyes, vestigial wings 484

Red eyes, vestigial wings 30

Purple eyes, normal wings 45

Follows Mendel’s rules for a dihybrid testcross

Shows epistasis

Eye color and wing length are linked

Eye color and wing length are X-linked

Follows Mendel’s rules for a dihybrid testcross

Shows epistasis

Eye color and wing length are linked

Eye color and wing length are X-linked

Explanation / Answer

Answer.

C. Eye color and wing length are linked

Explanation:

It is a test cross. The test cross ratio of dihybrid cross is 1:1:1:1, if the genes are independently assorted. If any deviation from the above ratio, it means that the genes are linked. The number of progeny in the given information. So that the eye color and wing length are linked.

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