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When does a recessive trait dominant over a dominant trait?
A recessive trait cannot be dominant over a dominant trait. Dominant traits are always expressed over recessive traits in heterozygous individuals because they mask the expression of the recessive trait.
Is the pressure gradient equal to gas flow over resistance?
Yes, in a simplified model, the pressure gradient can be considered as the driving force for gas flow, which overcomes the resistance offered by the system. The greater the pressure gradient, the higher the gas flow rate for a given resistance.
Would a population of 10 individuals or 100 individuals be more vulnerable to genetic drift?
A population of 10 individuals would be more vulnerable to genetic drift because there are fewer individuals contributing to the gene pool, leading to greater fluctuations in allele frequencies due to random chance. In contrast, a population of 100 individuals would have more genetic diversity and be less susceptible to genetic drift.
How can one calculate genetic distance between individuals or populations?
Genetic distance between individuals or populations can be calculated by comparing the differences in their DNA sequences. This can be done by analyzing specific genetic markers or using advanced techniques like whole-genome sequencing. The more differences there are in the DNA sequences, the greater the genetic distance between the individuals or populations.
What is needed for an ecosystem to create stability?
An ecosystem needs biodiversity, nutrient cycling, energy flow, and dynamic interactions among its components to create stability. These elements help maintain resilience in the face of disturbances, such as natural disasters or climate change.
What is Heterozygous advantage?
Heterozygous advantage refers to a genetic scenario where individuals carrying two different alleles for a particular gene (heterozygotes) exhibit a greater fitness or survival advantage compared to individuals who are homozygous for either allele. This phenomenon can lead to the maintenance of genetic diversity within a population, as it promotes the prevalence of both alleles. A classic example is seen in the case of sickle cell anemia, where individuals heterozygous for the sickle cell trait have increased resistance to malaria compared to those who are homozygous for the normal or sickle cell alleles.
Can heterozygous for sickle cell have greater resistance?
Yes, individuals who are heterozygous for the sickle cell trait (having one normal hemoglobin allele and one sickle cell allele) can have greater resistance to malaria. The presence of the sickle cell allele provides some protection against the malaria parasite, as the altered shape of the red blood cells makes it less hospitable for the parasite to thrive. This selective advantage is particularly observed in regions where malaria is endemic, leading to a higher prevalence of the sickle cell trait in those populations.
Which has the greater resistance thick wire or a thin of the same length?
The thermal resistance of a wire is proportional to ln(r2/r1), meaning that a thicker wire has a greater thermal resistance.
If wires are made from the same material and are the same length which would have greater resistance?
The wire with smaller diameter (thinner wire) will have greater resistance. This is because resistance is inversely proportional to the cross-sectional area of the wire. Thinner wires have smaller cross-sectional area, leading to greater resistance.
Is it true that for the same resistance the greater the voltage the greater the current?
true
The greater the surface area of an object the greater the air resistance?
Yes this is true.
Is the greater the surface area of an object the greater the air resistance?
yes it is true
What happens to the resistance as the conductor is measured?
The longer the conductor the greater the end to end resistance.
Is it true or false that the greater the surface area of an object the greater the air resistance?
true
Do conductors have low resistance?
Conductors have low resistance. Recall Ohm's law. The higher the conductor resistance, the greater the voltage drop along the conductor, and the less voltage that is available for the load. The conductor resistance is a resistance in series with the load. Also, higher conductor resistance results in more electrical power being converted into heat, warming up the conductors. This is calculated with the formula P=I2R. The greater the resistance, the greater the power wasted heating the conductors.
What value of the coefficient of friction the greater the resistance to sliding?
The greater the coefficient of friction between two surfaces, the greater the resistance to sliding between them. The coefficient of friction is a measure of the amount of friction between two surfaces, with higher values indicating a stronger resistance to sliding.
Why has the greater electrical resistance in wet skin?
Wet things are provide less resistance to electricity
