I marked the correct answers to these questions, but I just wantto know how to solve them.
1) In a cross of AaBbCcDdEeFf X AaBbccDdEeFf, what proportionwill have the ABCDeF phenotype?
A. 27/64
B. 27/128
C. 27/512
D. 81/512
E. 81/2048 ####
2.) In a cross of two flies +/vg Cy/+ +/se +/ab X +/vg +/+ se/seab/ab what proportion of the offspring will be mutant in phenotypefor all four markers?
A. 0
B. 3/64
C. 1/16
D. 1/32 ####
E. 1/64
3) A cross of two heterozygous individuals produces 74 dominantsand 26 recessives. What is the chi-square value for theseresults?
A. 8/25
B. 16/75
C. 4/75 ####
D. 8/75
E. 12/25
4) Shell orientation in snails is due to a maternal effect gene.A true breeding sinistral (recessive) is crossed to a true breedingDextral (dominant). The offspring from that cross are self-crossed.What will be the expected ratio of shell types?
A. All sinistral
B. All Dextral ####
C. Half sinistral, half Dextral
D. ¾ Dextral, ¼ sinistral
E. ¾ sinistral, ¼ Dextral
19) In peas, axial (A) flower position is dominant to terminal(a), tall (L) is dominant to short (l), and yellow (Y) is dominantto green (y). If a plant that is heterozygous for all three traitsis allowed to self-fertilize, how many of the offspring would bedominant for all three traits?
A) 3/64
B) 9/64
C) 27/64 ####
D) 32/64
E) 64/64
20) The product H substance is needed to express the bloodantigen. A mating of IA I B Hh X IA I B hh should produce whatratio of blood types?
a) 1/4 AB, 1/8 A, 1/8 B, 1/2 O ####
b) 3/8 AB, 3/16 A, 3/16 B, 1/4 O
c) 1/4 AB, 3/16 A, 3/16 B, 3/8 O
d) 3/16 AB, 3/8 A, 3/16 B, 1/4 O
e) 1/8 AB, 1/4 A, 1/8 B, 1/2 O
