question_answer

In a certain plant, red flowers (R) are dominant to white flowers (r) and tallness (T) is dominant to dwarfness (t). A heterozygous plant (RrTt) is backcrossed with a double recessive plant (rrtt). If the gene loci for colour and size and situated very close together on the same chromosome, the expected percentage of offsprings could be approximately

A)

	tall red	tall white	dwarf red	dwarf white
	25%	25%	25%	25%

B)

49%,

49%

1%

1%

C)

49%

1%

1%

49%

D)

1%

1%

49%

49%