A researcher is studying the color of grasshopper exoskeletons. Assume that this phenotype is caused by the action of two alleles. Green grasshoppers have the genotype AA and brown grasshoppers have the genotype aa. If the frequency of the A allele in this population is 0.2, what is the frequency of the a allele

0.8

Explanation:

Allele frequency reveals to us how frequent an allele is within a population.

It is estimated by numbering the amount of times of it occurrences divided by the overall amount of copies of the gene.

Mathematically:

Allele Frequency,

= amount of times the allele occurs

overall amount of copies of the gene.

The alleles frequency of a gene within a population is 1.

Let's recall the hardy Weinberg equation

p + q = 1

Where,

p = the frequency of dominant allele

q = the frequency of recessive allele.

Given,

Frequency of dominant allele (green color), p = 0.2

Frequency of recessive allele, q = ?

P + q = 1

0.2 + q = 1

q = 1 - 0.2

q = 0.8

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.