Answer:
Chi square value = 0.3
In order to find the expected value, an assumption of purple flower colour dominance over white flower colour has to be made.
Explanation:
<em>First, we will assume that the purple flower trait is dominant over white flower trait, and that the alleles segregate according to Mendelian standard. Hence, the expected F2 phenotypic ratio will be 3:1.</em>
In order to get the Chi square, the expected phenotype frequency will be calculated thus;
Expected frequency (E) for purple flowered plants = 3/4 x 160 = 120
Expected frequency (E) for white flowered plants = 1/4 x 160 = 40
Observed frequency (O) for purple flowered plants = 123
Observed frequency (O) for white flowered plants = 37
<em>Chi square =
</em>
For the purple colour flower
, which gives 0.075
For the white colour flower
, which gives 0.225
<em>Total = 0.075 + 0.225, which gives 0.3</em>