Question

1. All polytene chromosomes contained within the nucleus are interconnected at the chromocenter. (True or false)

2. The field of view that is seen through the oculars (eyepieces) is larger than the field of view captured by the camera. This question specifically refers to the microscopes available in the biology teaching laboratories. (True or false)

3. Polytene chromosomes presumably accommodate faster larval growth in Drosophila virilis.

Answer 1

1) True

Polytene chromosomes are giant chromosomes that begin as normal chromosomes, but through repeated rounds of DNA replication without any cell division, they become large, banded chromosomes. As a result, the centromeres of all the chromosomes bundle together in a mass called the chromocenter.

Hence, all polytene chromosomes contained within the nucleus are interconnected at the chromocenter.

2) True

In a typical microscope, the size of a camera sensor is rather smaller than the field of view as seen through the eyepieces.

3) true

Polytene cells have a metabolic advantage as multiple copies of genes permits a high level of gene expression that can lead to faster growth in larval drosophila.?