The abo blood group in humans is controlled by a single locus with three different alleles. homozygosity for la produces type a blood. homozygosity for ib produces type b blood. homozygosity for l° produces type o blood. type ab blood is produced by the genotype la/ib. io is recessive to ia and 1b, thus ia/l gives type a blood and ib/lo gives type b blood. at another locus, the rhesus or rh factor is also used in blood typing. the rhesus locus also has multiple alleles, but these alleles can be classified into two types, positive and negative. rh+ alleles are dominant over rh- alleles. the allele frequencies of these loci are as follows: for the abo alleles: [lo = .65 [ia] = .27 for the rh factor: [rh+] = .7 [rh-) = .3 18. at what frequency will an individual in this population be type "o", rh positive? e. 0.353 a. 0.210 b. 0.0577 c. 0.424 d. 0.384 19. at what frequency will an individual in this population be type "a", rh positive? e. 0.352 a. 0.210 b. 0.057; 3 c. 0.424 d. 0.386 20. the rarest type of blood is type ab rh negative. how many of these will be expected in 1000 individuals? a. 9.0 b. 10.2 c. 1.94 d. 3.89 e. 21.6