Question

The genes E, F, and G, are located on the same chromosome. The E,F and G alleles are completely dominant to e, f and g. From the following cross, eFg/EfG x efg/efg what is the genotype of progeny exhibiting dominant phenotypes for all three genes? A. efg/ Efg B. both A and B C. EFG/efg

Answer 1

C. EFG/efg

Step-by-step explanation:

The possible gametes for eFg/EfG are EFg, EfG, eFG and eFg. The possible gametes for efg/efg are efg only.

The cross can be represented as follows:

EFg | EfG

|_

efg | efg

When we cross these, we get the following possible genotypes and phenotypes:

• EFgEfgefgefg (phenotype: EFG)
• EfGEfgefgefg (phenotype: EFG)
• EFgefgefg (phenotype: Efg)
• EfGefgefg (phenotype: Efg)

So, the only genotype that exhibits dominant phenotypes for all three genes is EFgEfgefgefg, which corresponds to option C: EFG/efg.