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Genetic information, variation and relationships between organisms

Genetic information, variation and relationships between organisms

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Question 7

A cytogeneticist prepared a chromosome spread from a mammalian cell culture to analyze its karyotype.

1.

During the preparation of the chromosomes for microscopy, the cells were placed in a solution that had a slightly higher (less negative) water potential than the cell cytoplasm. Suggest two steps in the process of how this procedure moved the chromosomes apart without bursting the cell.

[2]
2.

The chromosomes in the karyotype are arranged in homologous pairs. What is a homologous pair of chromosomes?

[1]
3.

Give two ways in which the arrangement of prokaryotic DNA is different from the arrangement of eukaryotic DNA in the chromosome spread.

[2]
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Genetic information, variation and relationships between organisms Questions

  1. A Level
  2. /Biology
  3. /Genetic information, variation and relationships between organisms

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