Aproximadamente el 70% de los norteamericanos blancos perciben el gusto de la sustancia química feniltiocarbamida, y el resto no es capaz de percibirla. La capacidad para percibir el sabor de esta substancia química está determinada por el alelo "T", mientras que la incapacidad para percibirlo se determina por el alelo recesivo "t". ¿Cuál es la frecuencia de los alelos "p", "pq" y "q" en la población mencionada para que la misma se encuentre en equilibrio, conforme al Principio de Hardy-Weinberg?

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

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