The frequency of the recessive allele (r) is 0.6 , Frequency of dominant allele R (p) + freq. of recessive allele r (q) = 1if the frequency of allele R is 0.4 , so freq. of allele r is 0.6
Explanation:
Alleles:
An allele is a version of a gene, a heritable unit that controls a specific feature of an organism.For example, Mendel studied a gene that controls flower color in pea plants.This gene comes in: a white allele,w and a purple allele,Ww: recessive allele but W: is dominant alleleEach pea plant has two gene copies , which may be the same or different alleles, ex; (WW\ Ww\ ww) ( see first picture) If the two gene copies is:
WW: this mean pea plant will take purple color
Ww: the dominant purple allele,W, will hide the recessive
white allele, w,and pea plant will be purple.
ww: pea plant will be white
Allele frequency :
Refers to how frequently a particular allele appears in a population
(A population is a group of organisms of the same species that are found in the same area )
For example : if all the alleles in a population of pea plants were purple alleles, W, the allele frequency of W would be 100%, or 1 However, if half the alleles were W and half were w, each allele would have an allele frequency of 50%, or 0.5
Example: Finding allele frequency: ( see second picture)
Let’s look at an example ( pic. 2) Consider the very small population of nine pea plants . Each pea plant has two copies of the flower color gene. If we look at the two gene copies in each plant ( pic 2 ) and count up how many W copies are present, we find there are 13. If we count up how many w copies are present, we find that there are five. The total number of gene copies in the whole population is 13 + 5 = 18 .We can divide the number of copies of each allele by the total number of copies to get the allele frequency. When there are just two alleles for a gene in a population, their frequencies are given the symbols (p) and (q) :
The frequencies of all the alleles of a gene must add up to one ( p+q=1).
Learn more about :
Allele :
Genes:
Keyword:
Allele\ gene\ frecuency \ mendel \ genetics \heredity
