Question

In a experiment of Morgan in Drosophila for eye colour and wing size. What percentage of linkage was
observed in F2 generation ?
O 37.2%
O 1.3%
O 98.7%
O 62.8%​

Answer 1

Answer:

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Explanation:

62.8%

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Answer 2

98.7% of linkage was observed in the F2 generation. Due to the greater dimension of linkage of parental genes, parental orders are more leading in F2 generation of Drosophila.  

Explanation:

• According to Mendel, for a Dihybrid cross, the F2 Phenotypic ratio is 9:3:3:1.
• But, in the provided summary of dihybrid cross of white-eyed, yellow bodied female Drosophila that is hybridised with red-eyed, brown bodied male Drosophila, Morgan witnessed a remarkable difference in the ratio.
• It provided 98.7% progeny with parental variety sequences and 1.3% recombinants in the F2 generation.
• Morgan noted that when the two genes were found on the same chromosome in a dihybrid crossbreed, the parental gene blends were much more leading than non-parental ones.
• He presented the concept called 'Linkage', which is the natural connection of genes on a chromosome.
• When crossbreeding over of genes happens, the process is called 'Recombination'. Non-parental generation is called as 'Recombinants'.

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