Hair color is determined in labrador retrievers by alleles at the b and e loci. a dominant allele b encodes black pigment, whereas a recessive allele b encodes brown pigment. alleles at a second locus affect the deposition of the pigment in the shaft of the hair; dominant allele e allows dark pigment (black or brown) to be deposited, whereas recessive allele e prevents the deposition of dark pigment, causing the hair to be yellow.
what type of gene interaction does this represent?

a) recessive epistasis
b) dominant epistasis
c) duplicate recessive epistasis
d) duplicate dominant epistasis
e) dominant and recessive epistasis

D

Explanation:

duplicate dominant epistasis will occur whenever a dominant allele of one gene masks the expression of all alleles of other gene. It can be said that if an organism inherits one or two copies of the dominant allele, they will have the trait.

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.  

i am sorry but i need more information and a picture.