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lina2011 [118]
3 years ago
5

Name one bacterium that will appear as Gram positive coccus after the Gram stain?

Biology
1 answer:
jek_recluse [69]3 years ago
3 0

Answer:

staphylococci

Explanation:

Gram stain -

it is the method of staining which classify  the species of the bacteria into gram - positive and gram - negative .

This method distinguish the bacteria by its physical and chemical properties of the cell well of the bacteria .

1. In case of gram - positive , the stain is of color violet , because  to its thick cell wall .

and ,

2. In case of gram - negative , the stain is of pink color , because to thinner cell wall .

The bacterium , which shows Gram - positive coccus after the gram stain is staphylococci .

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In a Hardy-Weinberg population with two alleles that show complete dominance, the frequency of the recessive allele is 0.4. What
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The correct answer is E)52

When there is Hardy-Weinberg equilibrium like in this case of a single locus with two alleles denoted A and a with frequencies f(A) = p and f(a) = q, the expected genotype frequencies under random mating are f(AA) = p² for the AA homozygotes, f(aa) = q² for the aa homozygotes, and f(Aa) = 2pq for the heterozygotes. Let's put that A is dominant and a is recessive allele. In Hardy-Weinberg equilibrium we have:

p²+2*p*q+q²= 1     p+q=1      p=1-q

f(a) =0.4=q            q²=0.4²=0.16=16%    

p= 1-0.4=0.6         p²=0.6²=0.36=36%

Percentage of a homozygous genotype in the population is 16%+36%=52%




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