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andrew11 [14]
3 years ago
8

what is the division of the peripheral nervous system of vertebrates that connects to the internal organs?

Biology
2 answers:
love history [14]3 years ago
8 0
Autonomic nervous System.
Blababa [14]3 years ago
3 0
<span> <span>The PNS is divided into a) somatic and b) autonomic nervous system, and c) the enteric nervous system. Somatic nerves mediate voluntary movement. The </span>autonomic nervous system<span>) is the one that influences the function of </span><span>internal organs, it</span> <span>is further subdivided into the </span>sympathetic<span> <span>and the </span></span>parasympathetic<span> <span>nervous systems. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The </span></span>enteric nervous system<span> <span>functions to control the </span></span>gastrointestinal<span> <span>system. Both autonomic and enteric nervous systems function involuntarily. Nerves that exit from the cranium are called </span></span>cranial nerves<span> <span>while those exiting from the spinal cord are called </span></span>spinal nerves<span>.</span></span>
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Answer:

none

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4. The Rh blood type response system is controlled by the D allele. The genotypes DD and Dd are Rh (Rh positive); dd is Rh- (Rh
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Answer:

A - Frequency of D allele = 0.35

Frequency of d allele = 0.65

B- Frequency of DD genotype = 0.1225

Frequency of Dd genotype = 0.455

Frequency of dd genotype = 0.425.

C - Total population = 400

Frequency of heterozygous population = 400*0.455 = 183.

EXPLANATION:

The equilibrium sum of all the allelic frequency of a gene is always 1 and sum of all the genotypic frequency of all the genotype is always 1 - This is according to Hardy-Weinberg.

So p+q =1

p2+ 2pq+q2 =1

where p = frequency of dominant allele

q is the frequency of the recessive allele.

from the question, it was given that there were  170 individual out of 400, which were Rh- negative,

So q2 = 170/400 = 0.425

q= 0.65

Also p+q =1

so p = 1-q

or p = 1-0.65

Hence p =0.35

Frequency of homozgupus for D allele = 0.35*0.35 = 0.1225

Frequency of heterozygous or Dd will be 2pq.

or 2*0.35*0.65 = 0.455

A - Frequency of D allele = 0.35

Frequency of d allele = 0.65

B- Frequency of DD genotype = 0.1225

Frequency of Dd genotype = 0.455

Frequency of dd genotype = 0.425.

C - Total population = 400

Frequency of heterozygous population = 400*0.455 = 183.

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