In a particular species of tomato plant, the plants can bear fruits of different colors. Suppose a researcher crosses a homozygous plant that bears white fruit with a different stock of homozygous plant that also bears white fruit. In the F1 generation, all of the fruits are red. Two F1 plants are then crossed and the F2 progeny are examined. The F2 generation contains 331 plants with red fruit and 258 with white fruit.
Assuming that only one locus with two alleles (A and a) is involved in fruit color, what is the F1 genotype?
a.) Aa
b.) AA
c.) AA and aa
Assuming one locus with two alleles, what is the expected genotypic ratio of the F2 generation? Enter the ratio by rounding to the nearest whole number and using colons (such as 9:3:3:1).
Expected genotypic ratio:
Using the genotypic ratio determined in this step, what is the expected phenotypic ratio of the F2 generation? Enter the ratio of red fruit to white fruit, separated by a colon (such as 9:3:3:1).
Expected phenotypic ratio: