Question

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 Fı generation, all of the fruits are red. Two Fı plants are then crossed and the F2 progeny are examined. The F2 generation contains 219 plants with red fruit and 173 with white fruit. Stepl: Determine if there is one locus present. Assuming that only one locus with two alleles (A and a) is involved in fruit color, what is the Fı genotype? Aa ΑΑ 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:

Answer 1

The genotypic ratio: 1:2:1 and

the phenoypic ration is : 1:1 (White: aa, AA = 2 and Red: Aa = 2, so, 2:2 or 1:1 )

Find the below image for explanation

6 + Parents aa AA A ganales. Aa. i. fi AN Aa AA AW AN aa AA . A a aa . 2 the phenotypic ratio: 1 IV The genotypic Yatio: 1:2:17