If you are trying to determine the unknown genotype of an organism for a particular trait, you can perform a using a a. genetic analysis, homozygous dominant organism b. test cross, homozygous recessive organism c. blood test, sample from the organism d. karyotype, chromosome retrieval procedure

B. Test cross, homozygous recessive organism

Explanation:

Organisms that exhibits dominant phenotypes i.e. expressed phenotypes over another can be genetically homozygous (same alleles) or heterozygous (different alleles). It is impossible to tell the genotype of such dominant phenotype by merely looking at it, instead a cross called TEST CROSS is used.

A test cross is a cross between a dominant phenotype (unknown genotype) and a homozygous recessive genotype in order to determine the genotype of the unknown parent. The result of the test cross tells us what we want to know about the unknown genotype. If after the cross, all the offsprings also possess the dominant phenotype, it will be concluded that the parent whose genotype was unknown is HOMOZYGOUS.

On the other hand, if after the cross, an equal ratio of offsprings with the dominant and recessive phenotypes is obtained, we conclude that the parent with an unknown genotype is HETEROZYGOUS i.e. the recessive allele was present but being masked.

b - the respond is innate and varies over time.

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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.