The wild-type coat color, agouti (aa) is dominant to solid-colored fur (aa). however, a separate gene c, when present as the recessive homozygote (cc), negates any expression of pigment from the a gene and results in an albino mouse. therefore, the genotypes aacc, aacc, and aacc all produce the same albino phenotype. a cross between heterozygotes for both genes (aacc x aacc) would generate offspring with a phenotypic ratio of 9 agouti: 3 black: 4 albino. which type of gene interaction is this
a. complementary gene interaction. b. duplicate gene interaction. c. recessive epistasis.

This is an example of recessive epistasis.

Explanation:

Gene interactions happen between genes at different levels and have implications in the phenotypic expression, causing a wide genetic variability.

Epistasis means "interruption" and refers to interactions between genes located in different loci in the same chromosome. An “epistatic gene” can alter, influence, or suppress the expression of a "hypostatic gene". When the epistatic gene is recessive, the interaction is known as "recessive epistasis".

Observing the altered phenotype proportions of the offspring can reveal which interaction is operating in the trait determination.

In recessive epistasis, the proportion is 9:3:4.

what subject is this

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.