Could Koch's Postulates be used to prove the cause of a disease of man?

Consider a locus with two alleles - B and b. B is dominant, while b is recessive. There is no mutation. B has a selective advant

Marat540 [252]

Answer:

0.09

Explanation:

<h3><u>Before selection</u></h3>

Total number in population = 1000

Genotype frequencies

Genotype frequency of BB = 500/1000 = 0.5

Genotype frequency of Bb = 250/1000 = 0.25

Genotype frequency of bb = 250/1000 = 0.25

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.5 + (0.25/2) = 0.625

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.25 + (0.25/2) = 0.375

<h3><u>After selection</u></h3>

We are told that after selection, the genotype frequency of bb is changed as they become 50% less fit. This means the frequency of bb individuals changes from 250 to 125 individuals (50% reduction).

Now the total number of individuals is 500 + 125 + 250 = 875.

Genotype frequencies

Genotype frequency of BB = 500/875 = 0.57

Genotype frequency of Bb = 250/875 = 0.29

Genotype frequency of bb = 125/875 = 0.14

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.57 + (0.29/2) = 0.715

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.14 + (0.29/2) = 0.285

<h3><u>Change in frequency of B after 1 generation</u></h3>

0.715 - 0.625 = 0.09

7 0

2 years ago

What two compounds are the waste products of cellular respiration? * H2O and CO2 H2O and C6H12O6 CO2 and C6H12O6 ATP and CO2

rusak2 [61]

Answer:

The two compounds that correspond to waste products of cellular respiration are H₂O and CO₂.

Explanation:

The cellular metabolic waste products, specifically from cellular respiration are water (H₂O) and carbon dioxide (CO₂), from the oxidation of glucose into energy.

The process of <u>cellular respiration occurs in the mitochondria of eukaryotic cells and consists of a series of chemical reactions</u> where, from a glucose molecule, energy is obtained in the form of ATP molecules.

Obtaining H₂O and CO₂ from glucose can be summarized with the schematic reaction:

This summary indicates that a glucose molecule, when oxidized, produces as waste 6 molecules of water and 6 molecules of carbon dioxide. To reach this process all the reactions of the oxidative phosphorylation occur and 24 molecules of ATP are obtained for each molecule of glucose.

For the other options it is important to mention that:

<em><u>C₆H₁₂O₆</u></em><em> is the substrate from which cellular respiration takes place. </em>
<em><u>ATP </u></em><em>is the final product of cellular respiration, translated into energy to be used by the cell.</em>

5 0

3 years ago

Viruses reproduce by ___? 1) Asexual 2) fission 3) mitosis 4) none of the above

Katen [24]

hi there

your answer is :they asexual

The structure of viruses allows them to succeed in their main mission—reproduction. the Ly tic Cycle Once attached to a host cell,after a virus injects its nucleic acid into the cell. The nucleic acid takes over the normal operation of the host cell and produces multiple copies of the virus's protein coat and nucleic acid the host will get sick and yes, might die from it .

A large percentage of microorganisms, the prokaryotes (those without a nucleus) reproduce asexually.

I hope this helped u out

have a great afternoon

FaithRawlins14

6 0

2 years ago

What patterns do you see in the winds?

snow_tiger [21]

Answer:

winds in the Northern Hemisphere appear to curve to right as they move in the southern hemisphere, winds appear to curve to the left

Explanation:

5 0

3 years ago

Which of the following statements is false?

Mashcka [7]

Answer:

Today, most scientists believe instinct is more important than environment in animal behavior is false, so that's the answer. Enjoy.

6 0

3 years ago

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