Nstep9704 Nstep9704

31-01-2020
Biology

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The mating of an Aa male and an aa female produced an offspring with the genotype AAa. Therefore, the offspring has 3 copies of gene 1 (trisomy for Chromosome 1). At what stage during meiosis did the non-disjunction event occur and in which parent?

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mshahzaib247 mshahzaib247

02-02-2020

Answer:

Ana-phase 1 of Meiosis 1 in Male Parent...

Explanation:

It is clear that meiosis is only happening in male due to AAa nondisjuction of dominant AA from male parent. The disjunction is occuring during spermato-genesis during Ana-phase 1 of Meiosis 1 cause it is only possible explanation of tri-somy at Chromosome 1...

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