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Rus_ich [418]
2 years ago
13

High population densities in urban areas have advantages and disadvantages. List as many of each as you can and defend your conc

lusion. How could the disadvantages be eliminated or reduced? Use evidence to support your conclusion.
Biology
1 answer:
Readme [11.4K]2 years ago
8 0

<u>Advantages</u> :- More human population so more workers in different fields,More economy growth,More tax payers, More funds, More diversity ,More share of people for particular programs.

<u>Disadvantages</u> ;- Burden on economy, More exploitation of natural resources, pollution, deforestation, More use of water resources, more competition for survival :) hope this helps thanks

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In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another
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15

Explanation:

The genes for vestigial wings (vg) and purple eyes (pr) are linked on the same chromosome.

<u>The following cross was made:</u>

Heterozygous male for both genes   X female<em> vg pr / vg pr</em>  

The male could be either <em>vg+pr+/vg pr</em> or<em> vg+ pr/vg pr+</em>.

The female only produces <em>vg pr </em>gametes.

<u>The following offspring was observed: </u>

420 Normal wings and red eyes (<em>vg+ pr+/vg pr</em>)

430 Vestigial wings and purple eyes (<em>vg pr / vg pr</em>)

80 Vestigial wings and red eyes (<em>vg pr+ / vg pr</em>)

70 Normal wings and purple eyes (<em>vg+ pr / vg pr</em>)

Total: 1000

The individuals observed in the highest frequency have the parental genotypes. The recombinant individuals are <em>vg pr+ / vg pr</em> and <em>vg+ pr / vg pr.</em>

Distance = Number of recombinants × 100 / Total

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Distance = 15 cM.

<em>Just a small note, male drosophila do not experience crossing over in meiosis, so there would be no recombinants observed from this cross. The problem is probably mixed up, the female should be heterozygous and the male the homozygous recessive.</em>

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3 years ago
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