Describe the importance of light and dark G bands that a...

Question

Describe the importance of light and dark G bands that appear along chromosomes.

Accepted Answer

Hi, everyone. Let's take a look at this practice problem together. Which of the following options correctly describes the G bands on chromosomes. The answer options are a regions of chromosomes without DNA B, alternating bands on chromosomes visible with a special dye C segments of chromosomes that contains U chromatin and D regions of chromosomes that contains heterochromatin. Now recall that the G stands for GZA and they are, the G bands are made using Guam which is a specialized dye. The G bands that are produced from the G M sustain, create a unique banding pattern and this pattern is unique for each set of homologous chromosomes based on the amount of steam that is incorporated. This is helpful in Caro typing and useful for identifying chromosomal abnormalities. And so the color and darkness of the bands is influenced by several factors, including the chromatin structure, jean expression and the nucleotide sequence. So now that we've reviewed the information about G bands, let's take a look at the options. We can eliminate option a right off the bat. It states that regions of chromosomes without DNA. This is a false statement because all regions of chromosomes contain DNA Now, options C and D state that G bands occur in areas containing U chromatin and heterochromatin. Now, both of these options are partially correct G bands can occur in both types of chromatin. However, because the staining is influenced by many other factors than just the chromatin structure. This means that not all areas of euchromatin and heterochromatin are necessarily going to have G bands. Therefore, options C and D are incorrect. The statement that correctly describes G bands on chromosomes is option B, alternating bands on chromosomes visible with a special die. All right, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.

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Describe the importance of light and dark G bands that appear along chromosomes.

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