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erica [24]
3 years ago
9

Human height is a trait with a very broad range of phenotypes. which patter of inheritance could account for human height? Expla

in your answer.
Biology
1 answer:
4vir4ik [10]3 years ago
5 0



Becuase there is a broad range of phenotypes for human height, the trait is an example of a polygenetic (poly = many, genetic = of genes) trait.

Due to the vast variations of human height, the trait is clearly not purely dominant or recessive. A dominant trait is due to a dominant allele (variation of a gene) which completely masks a recessive allele. If only dominant and recessive height phenotypes existed, there would only be two heights observed in humans!

Since there is such a vast variation amongst human heights, the trait is an example of a polygenetic trait. Polygenetic traits are traits that are influenced by more than one gene at multiple loci (locations) on one or more chromosomes. This results in a continuous distribution of traits within a species. Other examples of polygenetic traits include skin color, hair color, and weight.
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In the study of Gigord and colleagues using Elderflower orchids, the allele frequencies of yellow and purple flowers varied such that when the yellow allele started to become rare, the reproductive success of purple flowers decreased and the reproductive success of yellow-flowered individuals increased in a process known as <u>frequency-dependent selection.</u>

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Frequency-dependent selection is an evolutionary process in which the fitness of a phenotype or genotype is dependent on the frequency of that phenotype or genotype in a particular population.

  • Positive frequency-dependent selection raises the fitness of a phenotype or genotype as it becomes more prevalent.
  • In the case of negative frequency-dependent selection, the fitness of an increasingly prevalent phenotype or genotype diminishes.

In a broader sense, frequency-dependent selection involves biological interactions that make the fitness of an individual dependent on the frequencies of other genotypes or phenotypes within the population.

Learn more about the frequency-dependent selection here :

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8 0
2 years ago
Which of Mendel's laws or principles explains that traits are passed from parents to offspring individually instead of as pairs,
neonofarm [45]
<span>Mendel's law or principle that explains that traits are passed from parents to offspring individually instead of pairs, groups, and/or sets B-The law of independent assortment. Mendel's Law of heredity includes the Law of segregation and the Law of independent assortment. The Law of segregation explains that alleles separate (segregate) during gamete formation and that offspring inherit only one allele from each parent. The Law of independent assortment explains that traits are passed individually and that they are independent of the inheritance of other traits.</span>
4 0
3 years ago
Explain the cause of circulatory in frog
Masteriza [31]

Answer:

In the frog, Rana, venous blood is driven into the right atrium of the heart by contraction of the sinus venosus, and it flows into the left atrium from the lungs. A wave of contraction then spreads over the whole atrium and drives blood into the ventricle, where blood from the two sources tends to remain separate.

Explanation:

hope it will help u

6 0
3 years ago
Compare and contrast symbiosis and competition.
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Competition happens when there are two species of similar kinds in the same environment and the resources are in supply, and Symbiosis is the close association between individuals of different species occurring in a whole community.
5 0
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Water reacts with sodium metal to produce sodium hydroxide and hydrogen gas, along with heat and light. What are the reactants i
Sergio039 [100]

Answer:

Reactant in the mentioned chemical reaction are:

Explanation:

Water ( H2O) and sodium metal ( Na )

Further Explanation:

Reactants are the beginning materials of a chemical reaction.

The substances newly formed are called products.

In the above reaction, sodium hydroxide, hydrogen gas, heat and light are the products.

When sodium is reacted with water, it dirt's on water producing a hissing sound due to the production of hydrogen gas.

7 0
3 years ago
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