Are tobacco, sun exposure and radiation exposure
Answer:
Eukaryotic genes are composed of exons, which correspond to protein-coding sequences, and intervening sequences called introns, which may be involved in gene regulation but are removed from the pre-mRNA during processing.
Answer:
The transgenic mouse must present fur without pigmentation, or with reduced pigmentation.
Explanation:
As seen in the question above, a group of scientists genetically engineers a mouse strain by deleting the mouse lyst gene and replacing it with the polar bear lyst gene. This will modify the genotype of the mice making them transgenic mice different from ordinary mice.
As you may already know, polar bears have pigment-free fur, for that reason, these animals have white fur, allowing them to camouflage themselves in the environment in which they live.
When the genes of these bears are not added to the genome of a mouse, we can expect the mouse fur to change, appearing without any type of pigmentation, becoming totally white, or, appearing lighter than normal.
DNA is most compacted when coiled to form the shape of chromosomes in the nucleus.
240.5 gram DNA is in an adult human’s body.
<u>Explanation:</u>
DNA is the genetic material in human body. It is given that each human cell has approximately 6.5 picograms of DNA. It is also given that there are 37 trillion cells in the body.
We have to calculate the amount of DNA in human body.
Number of cells=37 trillion = 
Amount of DNA per cell= 6.5 picogram = 
Total amount of DNA in body= 
=240.5 g
