The answer is c Over time, replace old street lights and traffic lights with solar-powered lights.<span>Since traffic lights need to be replaced over time anyway, changing them to solar-powered lights would reduce </span>energy<span> needed to run the city.
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The genetic variations seen in and between populations are known as human genetic variation.
Humans differ genetically from one another. Due to developmental mutations and gene copy-number variation, even monozygotic twins, who arise from a single zygote, may differ genetically. Techniques like genetic fingerprinting rely on individual differences, even between closely related people.
There are 324 million identified variations from sequenced human genomes as of 2017.
A person's genome typically differs from the reference genome by 20 million base pairs, or 0.6% of the total 3.2 billion base pairs, as of 2015.
In contrast to other species, humans are genetically uniform. While a limited number of genetic variations are found more commonly in particular geographic regions or in individuals with ancestry from those places, this variance accounts for the majority of genetic variation.
Genetic variation between populations occurs for at least three reasons. If an allele offers a competitive advantage, natural selection may endow people with an adaptive advantage in a particular environment.
Learn more about genetic variations is visit here;
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Answer:
There is a 25% probability that their child will have Tay-Sachs disease.
Explanation:
We know that:
People that are homozygous for the Tay-Sachs allele die, that means that the two copies of that allele are affected.
The members of the couple are both carriers, which means that they are both heterozygous for the Tay-Sachs allele, so they did not die because only one copy of the allele's pair is affected.
If we make a Punnet square where A stands for the affected allele and a for the normal one, we can see that both members of the couple are Aa and that there is only a 25% of probability that their child will have Tay-Sachs disease, as well as a 50% chance of being a carrier.
<u>║ A ║ a</u>
<u>A ║ AA ║Aa</u>
<u>a ║ aA║aa </u>
<u />
I think this answer would be C or D. i know it wasnt much hope i helped!
Could you give more information? For the most part, the dependent variable is what you’re recording. For example, if you wanted to see how plants would grow in different conditions, plant height would be the dependent variable. The height DEPENDS on the condition it was grown in. Hope this helps!