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kumpel [21]
4 years ago
11

Suggest an explanation for why using a condom helps to limit the transmission of HIV,

Biology
1 answer:
Cloud [144]4 years ago
5 0

Answer and Explanation:

HIV is a sexually transmitted disease that is caused by AIDS, a virus. Malaria is a protozoan disease that is cause by <em>plasmodium spp</em>. Both the virus and sporozoites of plasmodium live inside humans. However, in malaria, the sporozoites are inactive form of the parasite and they live in the human liver. The human being acts as an intermediate host for the life cycle to be complete.

In HIV, the virus incorporates its DNA into the host(human) genome and uses the resources to produce proteins that are found in the blood. Using a condom helps limit the transmission of HIV because the virus lives in the blood cells but does not affect the transmission of malaria because the sporozoites live in the liver and other organs. HIV can be transmitted sexually, transfusion with contaminated blood, sharing of infected needles and syringes while malaria is only transmitted through a mosquito bite.

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Why does the fishing industry watch for upwellings eagerly?​
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Answer:

Due to the fact that the Upwelling brings all of the nutrients and food for the fish to the surface which is where all the fish will be feeding. ... Compare rivers and surface currents. Both rivers and surface currents are long, moving bodies of water.

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In beans the pod texture and growth form genes are located on different chromosomes. There are two varieties of beans in a farme
irina1246 [14]

Answer:

a. Genotype in F1 - TtBb

   Phenotype in F1 - tough pods, bush-type growth

b. Proportion of F2 that are heterozygous for bush-type growth form = 5/8

c. Proportion of the F2 with tender pods =  1/4

d. Proportion of F2 that are heterozygous for growth form and have tender     pods = 1/8

Explanation:

Since the two traits are located on different chromosomes, they will independently assort during gametes formation. T is dominant over t and B is dominant over b.

Two true-breeding varieties were crossed at the beginning of the program:

TTBB   x   ttbb

All F1 plants will have the genotype TtBb with tough pods and bush-type growth form.

Advancing the cross to F2:

TtBb   x   TtBb

Progeny

1 TTBB   -   tough pods, bush-type

2 TTBb     -  tough pods, bush-type

2 TtBB    -   tough pods, bush-type

4 TtBb     -   tough pods, bush-type

1 TTbb     -    tough pods, climbing-type

2 Ttbb     -    tough pods, climbing-type

1 ttBB       -    tender pods, bush-type

2 ttBb     -      tender pods, bush-type

1 ttbb      -      tender pods, climbing-type

<em>Proportion of F2 that are heterozygous for bush-type growth form = 10/16 = 5/8</em>

<em>Proportion of the F2 with tender pods = 4/16 = 1/4</em>

<em>Proportion of F2 that are heterozygous for growth form and have tender pods = 2/16 = 1/8</em>

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