What is biochemical (or nutrient) cycling? why is it important?

1 answer:

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Answer: A nutrient cycle is when the substances of an ecosystem are recycled, moving through biotic and abiotic compartments. They are important because they regulate the elements needed for the physical and biological aspects of our planet.

Explanation: Ah, nutrient cycles, what a fun topic to learn! Also known as biogeochemical cycles in some textbooks, you might have probably heard of the water cycle, and also learned about the carbon, phosphorus, sulfur, and oxygen cycles. These cycles are natural in our world and happen because in our planet, nature recycles matter. These cycles allow for all elements of nature to be regulated, no matter what they are. The only bad thing though, these cycles have been recently interrupted by human activity.

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In a population of deer mice, the allele for white hair is recessive and the allele for brown hair is dominant. If the populatio

tigry1 [53]

Answer:

The frequency of recessive allele should be 0.30.

Explanation:

According to Hardy-Weinberg equilibrium, sum of both dominant allele frequency (p) and recessive allele frequency (q) should be equal to 1 (p+q = 1).

Brown hair = dominant (p)

white hair = recessive (q)

49% mice are brown hair

so dominant genotype frequency = 0.49

According to Hardy-Weinberg principle, square root of the genotype (homozygous) is equal to allele frequency.

√p =√0.49 = 0.70

The dominant allele frequency is 0.7

Now, by this value we can find the recessive allele frequency by

p + q = 1

1 - 0.7 = 0.3

So, the recessive allele (white hair mice) frequency is 0.30.

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