Answer:
Friedreich ataxia is inherited in an autosomal recessive manner.
Explanation:
Autosomal recessive disorder is a type of disorder which occurs only when abnormal genes are present in both cells. Autosomal recessive is a method through which disease is passed from parents to offspring. Friedreich's ataxia is a genetic disease that is very rare which causes difficultly in movement from one place to another, a loss of sensation in the arms and legs, and speech in the patients.
Answer:
The correct answer is D Sister Chromatids may not attach to each other.
Explanation:
Centromeres are the specific point to which the sister Chromatid binds.That means Centromere function to hold the sister Chromatids.
Now according to the question if mutation causes formation of defective centromere then the normal functioning of that centromere will be hampered.
As a result the sister chromatid may not attach to each other.
Answer:
The duration that it takes for all voltage-gated Na+ channels to return to a closed, but active (not inactivated) state after the initial rapid depolarization "spike". ( D )
Explanation:
The property of a neuron's action potential that determines the maximum firing rate is ; The duration that it takes for all voltage-gated Na+ channels to return to a closed, but active (not inactivated) state after the initial rapid depolarization "spike".
The firing rate of a neuron defines the number of spikes that a neuron can produce per second and for a typical neuron that number is from 1 spike to 200 spikes per second
