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AlladinOne [14]
3 years ago
6

There have been many reports of environmental improvements being seen around the world due to self isolation orders. What do you

think about this? Is the lockdown benefiting the environment?
Write a paragraph by researching and take notes (must be at least 5 sentences), and 2 cited sources (just type the link to the sources that you used).

please helppp thank youu
Biology
1 answer:
kaheart [24]3 years ago
5 0
Though the lockdown has undoubtedly had somewhat of a negative impact on certain acpects of our society, there’s no denying that our environment has seen certain benefits since we’ve tucked ourselves away in our homes. According to the Earth Observatory at NASA, satellites have detected decreased levels of air pollution as well as carbon monoxide emission. This is attributed to the closure of most industries as well as the lack of cars and other transportation on the road. Though it isn’t just the air we’re beginning to notice changes in- for the first time in a very long time, the canals in Venice are crystal clear. With fewer boats and tourists about, the water is free of pollution for the first time in centuries. With these facts in mind, I can safely say that I believe the lockdown has definitely positively benefited the environment, but it’s up to us to keep it that way once it ends.
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Two short-tailed Manx cats are bred together. They produce 3 kittens with long tails 5 short tails and 2 without tails. From the
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Answer and Explanation:

There are three phenotypes, so it seems that this an example of incomplete dominance, with the short tail being the intermediate form between long-tail and no-tail. Incomplete dominance is a condition where neither of the alleles completely dominates over the other one. Dominant alleles cannot completely cover up the recessive alleles. Descendents possess an intermediate phenotype between the two parental phenotypes and not the dominant one, which would appear if this would be the case of complete dominance.

<u>Available data:</u>

  • Two short-tailed Manx cats are bred together.
  • F1: 3 kittens with long tails, 5 short tails, and 2 without tails.

The T gene might express the tail trait. T allele expresses long the tail and is dominant over t allele which expresses the absence of the tail.  

So, homozygous dominant individuals, TT, are long-tailed animals

homozygous recessive individuals, tt, have no tail

Heterozygous individuals, Tt, are short-tailed animals, the intermediate form.

Cross: Two short-tailed Manx cats are bred together

Parental)  Tt    x    Tt

Gametes) T   t   T   t

Punnet Square)  T        t

                   T    TT     Tt

                    t     Tt       tt

F1)  1/4 TT = Long-tailed animals

     2/4=1/2 Tt = Short-tailed animals

     1/4 tt = untailed animals

The ratio 3:5:2 of the progeny in the example is close enough to the Mendelian ratio 1:2:1.

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