Some plants have flower color that is determined by incomplete dominance, thus both genes are expressed and the color is a blend of the two. In the Four O'clock flower heterozygotes have pink flowers while homozygotes are red or white. A plant with pink flowers was crossed ith a plant with red flowers. If 300 offspring were produced, what number of the F1 Generation would have red flowers?\

According to the given information, the pink-flowered plant (Rr) is crossed with a red-flowered plant (RR). The pink-flowered plant would make two types of gametes: 1/2 with "R" and 1/2 with "r".

The red-flowered plant would make all gametes with "R" allele. The random fusion of these gametes gives pink and red-flowered progeny in 1:1 ratio.

Since 50% of plants of the progeny are red-flowered, out of 300 offspring, the total red-flowered plants would be= 50 % of 300 = 150.