A test cross of an unknown F₁ to a homozygous recessive yields a 1:1:1:1 ratio of phenotypes. The unknown F₁ is most likely
- A
Homozygous dominant at both loci
- B
Homozygous recessive at both loci
- Ccheck_circle
Heterozygous at both loci with the genes UNlinked (or far apart)
- D
Heterozygous with the genes tightly linked
Explanation
1:1:1:1 indicates independent assortment of two heterozygous genes. Linkage would skew toward parental types.