What are the consequences of high levels of fertilizing chemicals in water?

1 answer:

8 0

The run off and leaching of chemicals from fertilizers end up in rivulets, lakes, ponds, rivers and other water sources.Nitrate fertilizers and phosphates encourages the rapid growth of algae and vascular plants.This in turn reduces the availability of light and oxygen in water.This makes uninhabitable for some species.

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In rats, the allele for long whiskers is dominant to the allele for short whiskers. At another gene locus, a dominant allele pro

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Answer:

25%

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We have 2 independent genes with 2 alleles each: L/l and W/w

W_: whiskers
ww: no whiskers
L_: long whiskers
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Individuals with short whiskers will have the genotype WWll or Wwll.

A cross between a rat heterozygous for both genes and a homozygous recessive rat is done:

-The homozygous rat will produce only wl gametes.

-The heterozygous rat will produce the following gametes: WL, Wl, wL, wl.

If you do a Punnett Square, you'll get that 25% of the offspring will be WwLl and will have short whiskers.

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