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LekaFEV [45]
3 years ago
12

Which three elements are often found in organic compounds?

Biology
2 answers:
Reika [66]3 years ago
5 0
Three elements are found in organic commands are carbon, hydrogen and oxygen
vodomira [7]3 years ago
3 0

Answer:

carbon, hydrogen and oxygen

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The layer of the earth that is composed of large plates that interlock and move over time is the _______.
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The maxillary bones and mandible are part of which structure?
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Nana76 [90]

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A,B,D.

Explanation:

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How do volcanoes form at B?
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4 0
3 years ago
Consider the following chromosomes and if they are affected by hemophilia.
Inga [223]

Answer:

B. 1/2 and 1/4

Explanation:

Hemophilia is a rare disease that has to do with the inability for blood to clot. It is inherited on the X chromosome, hence, it is said to be X-linked. It is usually passed from mother to son. According to this question;

X - unaffected X chromosome

x = X chromosome affected by hemophilia

Y = Y chromosome

Therefore, in a cross between a Xx female (carrier) and a XY male (unaffected), the following chromosomes will be present in the gametes produced by each parent:

Xx- X and x gametes

XY- X and Y gametes

Using these gametes in a punnet square (see attached image), offsprings with genotypes: XX, Xx, XY and xY will be possibly produced.

XX (1) - unaffected female

Xx (1) - unaffected but carrier female

XY (1) - unaffected male

xY (1) - affected male (have hemophilia)

Based on the questions;

- 2 out of the possible 4 children will have the affected chromosomes i.e. both xY son and Xx daughter have the affected (x) chromosome. Hence, the fraction is 1/2

- 1 out of the 4 possible children is affected by hemophilia, which is the xY son. Hence, the fraction is 1/4.

4 0
2 years ago
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