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Aleksandr-060686 [28]
3 years ago
14

In which of the following situations would sex selection not be ethically recommended?

Biology
2 answers:
likoan [24]3 years ago
8 0
C, because it doesn't matter if they all have the same genders but the functions of the body with the other options could affect the babies body. 
Ne4ueva [31]3 years ago
6 0


(c) The family already has five children of the same sex.

all other answers have genetic factors determined by sex.

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How do you think scientists use differences in characteristics to organize groups?
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Answer:

by looking at their physical features, the fossil record, and dna sequences

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1 year ago
Identify the neurons described
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<u>Motor neurons </u>send messages to the muscles and glands to respond to stimuli.

<u>Sensory neurons </u>move information towards the central nervous system for processing.

<u>Interneurons </u>carry information from one type of neuron to another.

Explanation:

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​a region of dna that contains instructions for the amino acid sequence of a particular protein is called a(n) ____.
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2 years ago
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tester [92]

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The colonies are carrying the resistance genes from plasmids

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Bacteria can acquire beneficial characteristics that they didn’t have. One way for these is through plasmids, which ones are little fragments of DNA that usually contains resistance genes (for antibiotics, disinfectants, heavy metals, etc.) or other capacities, like the ability to use some substances (for example sugars).

In this specific situation, we already know that the plasmid carrying genes for tetracycline resistance and the <em>lacZ</em> gene.  

A little explanation:

Tetracycline is an antibiotic that inhibits bacterial growth and kills the bacteria.  The bacteria can “fight” to this antibiotic if it has a resistant gene, the result is that the antibiotic can’t affect the bacteria and survive.  An analogy is like a Police Officer (bacteria) that have a bulletproof vest (tetracycline-resistant gene) so the bullets (tetracycline) didn’t affect the police.

In the case of X-gal, is a compound consisting primarily in one sugar called galactose. Not all bacteria can eat galactose, they need an enzyme called β- galactosidase (comes from <em>lacZ</em> gene) that helps the bacteria “eat” the sugar (cuts the sugar in little pieces so the bacteria can eat).  

Then, as the bacterial colonies can grow in the medium with tetracycline and X-gal,  we know that those bacteria are carrying the resistance genes for tetracycline (does not affect the bacteria) and the <em>lacZ</em> gene (bacteria produce β- galactosidase that cuts galactose). These genes are coming from the plasmids because we already know that the plasmid carries these genes and not from the exogenous DNA.  

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