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People with sickle cell anemia are resistant to malaria, which increases their ability to survive and produce offspring. This is evolution in action. Since malaria is a bigger problem in Africa than in America, it is more prevalent in Africa. Many black people in America have inherited this gene from their ancestors
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What is the advantage of being heterozygous for the sickle cell allele?
Sickle cell trait carries a lower risk of serious malarial disease, without the signs and symptoms of sickle-cell anemia.
What is the Random change in a populations allele frequency is known?
Genetic drift is the random change in allele frequencies in a population. It is caused by chance events and has more pronounced effects in small populations where genetic diversity is lower. Over time, genetic drift can lead to the loss of certain alleles or fixation of others in a population.
What is the relation between pitch and frequency?
the lower the frequency the lower the pitch; higher pitch lower frequency
Which had lower frequency infrared radiation or red light?
Infrared has a lower frequency.
What wave have a lower frequency TV or infrared?
TV has a lower frequency then infrared.
What does a lower case letter of an allele refer mean?
A lower case letter for an allele typically indicates a recessive trait. In genetics, alleles are alternate forms of a gene that can produce different effects on an organism's phenotype. The convention of using lower case letters for recessive alleles helps distinguish them from dominant alleles, which are usually represented by capital letters.
A recessive allele is respresented by?
a lower case letter that is the same letter as the upper case letter that represents the dominant allele
What is an Egyptian wooden sickle used for?
The sickle blade was used for farming and, by the lower class peasents but mostly used for war by the Egyptian army.
What is the general term for an allele that masked in the phenotype by the present of another allele?
Recessive. It is denoted by the lower case version of the first letter of the Dominant gene. For example, if the dominant is "A" then the allele is "a".
What stands for recess?
a recessive allele is shown using a lower case letter a dominant allele is shown using a capital letter
Is a higher or lower accident frequency rate better?
A lower accident frequency rate is better as "frequency" means "how often something occurs".
The frequency of a vibrating object determines its what?
The frequency of a vibrating object determines its pitch. A higher frequency corresponds to a higher pitch, while a lower frequency corresponds to a lower pitch.
