occurs when a DNA gene is damaged or changed in such a way a to alter the genetic message carried by that gene. A mutation is an gent of substance that can bring about permanent alteration to the physical composition of a DNA gene such that the genetic message is changed

7 0

2 years ago

Imagine that four genes on a single chromosome in a mutant phenotype of Drosophila cross over at half the normal rate as in the

lesantik [10]

We know that frequency of recombination is proportional with the distance between the genes on the chromosome. Therefore when the recombination rate is higher that means the distance between the genes on the chromosome is bigger. If the recombination rate is lower that means the genes are closer to each other on the chromosome. In this case the cross over rate is half the normal rate in the wild-type. That means that on the genetic map the distance between the two genes on the wild type will be twice bigger than the genes of the mutated Drosophila.

6 0

2 years ago

How does lactulose help with hepatic encephalopathy?

galben [10]

<span>Hepatic encephalopathy is a condition seen patients with liver dysfunction and this condition describe a spectrum of reversible neuropsychiatric abnormalities which implies that altered brain function which is due to metabolic abnormalities. However, the administration of lactulose causes reduction in the urea production rate which is consistent with the reduced entry of ammonia into portal blood.</span>

5 0

2 years ago