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4 years ago

Write a letter to the congressman telling him why it is important to find new sources of energy.

2 answers:

5 0

Congressman,

I am writing to tell you that energy comes in many forms, and we should start investing in and finding new sources of energy. Resources such as coal are depleting as demand and population rise. Therefore, we should move to renewable sources of energy, such as solar, wind and water power.

Regards,

Student

erma4kov [3.2K]4 years ago

3 0

Dear Congressman,

I am writing to you to you to inform you about our depleting energy sources. It is important for us to find new sources of energy so we do not run out of the ones we have now. Soon enough we will run out of coal and gas. We should find new ways to use solar energy and maybe ways to use waste energy. We need to save the environment before it is destroyed.

Sincerely,
(Your name)

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3 years ago

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3 years ago

Mom is A+. She has 2 children, one is O+ and the other is B-. (Note: Rh+ is RR or Rr, and Rh- is rr) What are the father’s possi

mezya [45]

Answer:

The blood group of the father must be B.
The genotype of blood group would be $I^{B}i$ .
The Rh factor of the father can either be positive or negative.
Thus, the genotype of Rh factor of father would be either Rr or rr.

Rh factor:

The phenotype of the mother Rh factor is positive. Thus, she can have Rr or RR as her genotype as positive is a dominant trait.

If the genotype of the mother is RR then all the offspring would be positive for Rh factor. However, one of the offspring is Rh negative, that means the mother must be heterozygous that is, Rr.

The genotype of the father can either be Rr or rr in order to produce offspring with positive as well as negative Rh.

Blood group:

The blood group of the mother is A. Thus, the genotype can either be $I^{A}I^{A}$ or $I^{A}i$ .

However, the blood groups of the children are O+ and B+.

Thus, the genotype of the mother must be heterozygous that is $I^{A}i$ .

The blood group of the father must be B with genotype $I^{B}i$ in order to produce offspring with blood group O and B.

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3 years ago