Question

a diploid organism has 6 chromosomes in its somatic cells. determine the number of gametes with different chromosome compositions that this organism can potentially create.

explain your answer, including the genetic basis for your calculations ignore the allelic variation created by crossing over.

Answer 1

The diploid organism has 6 chromosomes in its somatic cells. 6 chromosome states that these chromosomes occurs in pairs. Therefore this diploid organism has three pairs of chromosomes.One chromosome in each pair is obtained from one parent and the another pair is obtained from the the second parent.We know that the chromosomes occur in pairs and there are three pairs of chromosomes. Therefore the different chromosomes composition that this organism can potentially create can be found by applying the the simple calculation.Power is considered as total pair of somatic cells and the the base is considered as 2 because the chromosomes occurs in pairs.In this case as the number of chromosome is 6 and there are 3 pairs.
therefore the two raise to power three is the total number of different chromosome compositions. (2)^3 is 8. Therefore 8 is the different chromosomes.The gamete that is produced contains only one chromosome per pair . In this case as the total number of chromosome is 6 then the number of chromosomes in the gamete is 3.There is no crossing over during the crossing over stage. Crossing over occurs in the pachytene stage of the stage 1 of meiosis.Crossing over is the exchange of genetic material between two homologous chromosomes.
Hence, the gamete with different chromosome composition that this organism can potentially create is 8.

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