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Answer:
Modes of transmission or means of transmission is defined as the movement or transmission of pathogen from infected person or any reservoir to other person.
<u>4 ways or modes of transmission of diseases include:</u>
- <u>Contact (direct and/or indirect)</u> - Direct contact include physical relation between infected person or susceptible person such as kissing, sexual contact or transfer of oral secretion. Diseases caused by direct contact include small pox, pink eye and hepatitis a and B. Indirect contact include transmission of diseases form infected person to susceptible person through a infected surface such as infected needle.
- <u>Droplet: </u>water droplet coming out of the mouth, perspiration or other open parts of the body carries pathogens to susceptible person. sneezing and coughing are most common of droplet ways through which diseases spread.
- <u>Airborne:</u> Some of the diseases are spread through means of air such as chickenpox virus, norovirus, measles morbillivirus, Mycobacterium tuberculosis and influenza virus et-cetra.
- <u>Vector:</u> Vectors are defined as an organism that carries disease causing pathogens from infected person to other host body. Fleas or other insects are example of vectors.
Hence, 4 ways that different types of disease transmission that can make a person ill are droplet, Contact (direct and/or indirect), vectors and airborne.
The percentage of the population that possesses the heterozygous advantage is 0.32 (2pq). It is a principle known as the Hardy Weinberg equilibrium.
<h3>Hardy Weinberg equilibrium</h3>
The Hardy-Weinberg equilibrium is a principle in population genetics that states that allele and genotype frequencies in a population will remain constant across generations in the absence of different evolutionary forces.
The equation of the Hardy Weinberg equilibrium is p² + 2pq + q² = 1, where p² is the dominant homo-zygous frequency, q² is the recessive homo-zygous frequency, and 2pq is equal to the heterozygous frequency.
In this case,
- q² = 0.04 >> q = √0.04 = 0.2
- p + q = 1 >> p + 0.2 = 1 >> p = 0.8
According to the Hardy Weinberg equilibrium, the number of heterozygous is equal to 2pq.
In this case,
- 2pq = 2 x (0.2 x 0.8) = 0.32
Learn more about the Hardy Weinberg equilibrium here:
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Answer:
that of the bacteria found in indoor air, the most common four are: Micrococcus, Staphylococcus, Bacillus, and Pseudomonas. Micrococcus is a sphere-shaped (coccus/cocci generally means spherical), relatively harmless bacterium
The plasma membrane is also known as the Cell Membrane which is the outermost layer of a cell, therefore it is true.
