is a phenomenon in which traits controlled by one gene mask traits contolled by another gene. An example of this is coat color in dogs, where a homozygous recessive genotype at gene E (ee) can mask the expression of the genotype at gene B.

Epistasis

Explanation:Epistasis is a phenomenon that occur when the presence of a gene mask/ surprise the effect of another gene.

Epistasis can be1. intra allelic i.e within gene - This implies that the presence of an allele of the same gene mask the effect of the other on the same locus

2.Inter allelic- Two different gene where the presence

of a gene mask the effect of the other.

An epistatic gene is one who expresses itself over the other gene . It could be beneficial if the gene who is effect is masked or supress is of deleterious effect.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

. the sierra madre fault zone of southern california

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