In a population of humans, the frequency of straight hair is 34 percent. If straight hair is the recessive phenotype, what is the frequency of the homozygous recessive genotype?

Answers

Answer 1
Answer: The frequency of the recessive phenotype is also 34%
There are 3 genotypes: Homozygous Dominant, Hetrozygous Dominant, and Homozygous Recessive. There is no such thing as Hetrozygous Recessive as a Dominant trait will express it self over a Recessive.

Lets say the letter for Curly hair is H and the letter for straight hair is h.
Now lets make a legend for the genotypes
Homozygous Dominant: HH
Heterozygous Dominant: Hh
Homozygous Recessive: hh

Since straight hair is a recessive gene and is only expressed when there is no dominant gene, the genotype for straight hair is "hh"

Therefore, the frequency of the homozygous recessive genotype which is the frequency for straight hair, is 34%
Answer 2
Answer:

Answer:

B. 34 percent

Explanation:

I can confirm this is the correct answer because I just took the test.


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What is the difference between a carbon footprint and an ecological, or global, footprint?

Answers

A carbon footprint deals with the resource usage but focuses strictly on the greenhouse gases released due to burning of fossil fuels. Greenhouse gas calculation make up a portion of an ecological footprint. An ecological footprint compares the total resources people consume with the land and water area that is needed to replace those resources, it measures the demand human populations put on nature. Both calculations illustrate the impact of human activity on the environment. 

Answer:

A carbon footprint deals with the resource usage but focuses strictly on the greenhouse gases released due to burning of fossil fuels. Greenhouse gas calculation make up a portion of an ecological footprint. An ecological footprint compares the total resources people consume with the land and water area that is needed to replace those resources, it measures the demand human populations put on nature. Both calculations illustrate the impact of human activity on the environment.

Explanation:

How to calculate the orbital period of Mercury

Answers

Orbital period is the  time taken for a given object to make one complete orbit around another object. Mercury orbits the Sun in 88 days. Therefore, Mercury's orbital period is calculated by (88/365.25) or .241 Earth years. Hope this answers the question.

Orbital period of mercury can be calculated using the third law of Kepler which states that period squared equals to distance cubed, that is, (T1/T2)^2 = (a1/a2)^3 Where T1 is the orbital period of mercury, T2 is the earth orbital period and is equal to 1 year, that is, 365.25 days. a1 is the mercury axis and is equal to 0.39AU while a2 is the earth axis and is equal to 1AU. T^2 = (0.39)^3 = 0.059319 Therefore, T1 = 88 days.



Which would least likely be seen on an information pamphlet for red tide? People tend to stay out of the water in the area of a red tide. People are warned to avoid eating shrimp and lobster. People are making an effort to protect coastal areas from pollution. People with respiratory conditions may be affected.

Answers

Correct answer: B). People are warned to avoid eating shrimp and lobster.

People are warned to avoid eating of lobster and shrimp that would be least likely to be seen on a pamphlet of red tide because lobsters and shrimp are not affected by the red tides.

The fishes that are affected by red tide are shellfish and oysters. so if someone consumes shrimp and lobster then it would not create any problem related to red tide. Red tide is considered harmful to humans and they can cause death if consumed.




The information pamphlet for red tide is ‘People are warned to avoid eating shrimp and lobster’. Because eating one will likely cause death du tot poisononing.

Why are cane toads in Australia considered an invasive species rather than simply nonnative?

Answers

Even though both nonnative soecies and invasive species were introduced to an ecosystem rather than being there naturally, invasive species cause harm to the ecosystem because they do not have natural predators and therefore overpopulate and use up more resources, which harms other species.

Answer:

The answer is A "They are destructive to native species and have no natural predators."

Explanation:

I just took the test and this was correct :)

Animal cells have all of the following exceptA. mitochondria.
B. chloroplasts.
C. a nucleus.
D. Golgi apparatus.

Answers

Animal cells do not have chloroplasts, so answer choice (B) is the correct one. All animals (unless there are any bizarre exceptions that I'm not aware of, or as long as we're not categorizing some unicellular organisms as animals) are eukaryotic, which means that their cells contain nuclei, meaning that (C) is not valid. Mitochondria are found in all eukaryotic cells, including those of mammals, so (A) is also not correct. The Golgi apparatus is another organelle found in eukaryotic cells, and they are found in animal cells, so (D) is not correct. But chloroplasts are the organelles responsible for conducting photosynthesis, which is something that only plants and not animals are capable of, so there are no chloroplasts in animal cells.

Which of the following best describes the characteristics of less fertile soils, increase in disease-carrying mosquitoes, and flooding of homes and villages?A. effects of dams on society
B. effects of a decreasing beaver population
C. effects of agricultural farming
D. effects of density-dependent factors

Answers

The correct answer is:

A. effects of dams on society

Explanation:

The exchange of a river's flow and sediment conveyor downstream of a dam often causes the greatest sustained environmental impacts. Yet even complex changes in the number and timing of water flows impact aquatic and riparian life, which can explain the biological web of a river system.


"Effects of dams on society" is the one among the following choices given in the question that best describes the characteristics of less fertile soils, increase in disease-carrying mosquitoes, and flooding of homes andvillages. The correct option is the first option or option "A". I hope it helps you.