The unusually high frequency of "blue skin" in the area is an example of <u>genetic drift</u>.
<u>Explanation:</u>
It is a shift in the occurrence of an established gene variant within a population due to spontaneous organism screening. The offspring alleles are a composite of those in the parents and opportunity has a role to play in deciding whether or not a given person persists and reproduces.
The bottleneck impact is an interesting instance of genetic drift which take place when the population size is drastically reduced. Occurrences like natural disasters such as earthquakes, floods, fires can destroy a city, eliminate most people and leave a tiny, random assortment of survivors remaining.
Answer:
Option-C
Explanation:
The M phase of the cell cycle proceeds in the four phases: prophase followed by metaphase then anaphase, and telophase.
These sub-phases can be easily distinguished as the genetic material move in the cell in various form and the changes become characteristic of the subphases.
During metaphase, the chromosomes are aligned at the center of the cell or at the imaginary equatorial plate. Since it is mentioned that the drug shows its effect when the chromosomes are aligned at the equatorial plate therefore he is referring to the metaphase of the cycle.
Thus, metaphase is correct.
The most effective preventive measure against Lyme disease among a stable of racehorses is Spraying down the stables regularly with an insecticide designed for ticks.
After removing the tick Abigail Bartholomew begins on antibiotics. Abigail worries that an open wound from a tick will lead to sepsis. The vascular system also called the circulatory system consists of blood vessels that carry blood and lymph throughout the body.
Arteries and veins carry blood throughout the body deliver oxygen and nutrients to the body's tissues and remove waste products from the tissues. Although many young animals can die the disease is usually not fatal in adult animals. However, it causes severe pain and suffering, especially in cattle. Animals can become permanently lame and recovering animals can be less productive.
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Answer:
33%.
Explanation:
The 4% population is red-hair due to the recessive mutation in melanocortin 1 receptor (MC1R).
Since, the population is in Hardy-Weinberg equillibrium- laet the frequency of recessive allele with red - hair is 'q' and the frequency of dominant allele in the population is 'p'.
q=0.2
According to hardy-weinberg equillibrium
(p+q)=1
p=1-q
p=1-0.2
p=0.8.
The total population with non red hair is calculated by
=
= 0.64 + 0.32
= 0.96
The percentage of the population with non red headed carrier for MC1Rr is calculated by:
=0.32/0.96*100
=33%
Thus, the correct answer is (B).
The characteristics that makes golden eagles successful hunters is their good eyesight and their large wingspans.
<h3>The characteristics of a golden eagle:</h3>
The golden eagle is one of the most widespread eagle in the world.
That is because they are able to adapt in almost every type of climate, especially open areas with vegetation.
Some of the characteristics that makes them successful hunters is the good eyesight and large wingspans they possess.
Taking the vision of human beings for example, what looks sharp and clear to us at 5 feet is just as clear to a golden eagle from 20 feet away.
Also, their large wingspans helps then fly long distance in search of preys.
Therefore, the characteristics that makes golden eagles successful hunters is their good eyesight and their large wingspans.
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