A student investigated the inheritance of two genes, G and H, in a species of insect. A heterozygous individual with genotype GgHh GgHh\,GgHh has the dominant alleles G G\,G and H H\,H linked on one chromosome, and the recessive alleles g g\,g and h h\,h linked on the homologous chromosome, as shown below:
This heterozygous individual was crossed with a homozygous recessive individual with genotype gghhgghhgghh.
Assuming complete autosomal linkage with no crossing over occurs during meiosis in the heterozygote, which row in the table correctly describes the offspring produced from this test cross?
| Row | Phenotypes of offspring | Recombinant phenotypes produced? | Expected ratio of offspring phenotypes |
|---|---|---|---|
| A | Parental and recombinant | Yes | 1:1:1:11:1:1:11:1:1:1 |
| B | Parental only | No | 1:11:11:1 |
| C | Parental and recombinant | Yes | 9:3:3:19:3:3:19:3:3:1 |
| D | Parental only | No | 3:13:13:1 |
Row A
Row B
Row C
Row D