Abo blood typing uses 3 alleles. from your course notes answer the following two questions: which two are dominant? write the two dominant allele genotypes, using the capital letter i, and then a superscript for each of them. which allele is recessive? write the genotype (letters) for the recessive trait, beginning with the lower case i.

Dominant alleles: I^A and I^B

Two Dominant allele genotype: I^AI^A, I^BI^B and I^AI^B

Recessive allele: "i"

Recessive allele genotype= "ii"

Explanation:

The ABO blood typing is regulated by three alleles: I^A, I^B and i. Here, alleles I^B and I^A are dominant over the allele "i" while I^A and I^B exhibit codominance for each other. Since the allele "i" is recessive to the allele I^A, the genotypes "I^AI^A" and "I^A i" impart blood type A to the individual.

Similarly, the genotypes "I^BI^B" and "I^B i" impart the blood type B to the individual. The genotype "I^AI^B" gives blood type "AB". The allele “i” is expressed only in the homozygous state and the genotype "ii" makes the blood type "O".

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

c

explanation: