Biology · Genetics

A plant heterozygous for a dominant trait was selfed. The progeny had 140 plants showing the dominant trait and 20 plants showing the recessive trait. A researcher hypothesised that there are two genes with identical functions that control the dominant tr ait and that these two genes are not linked. Which one of the following options is the correct chi-square (χ2) value (rounded to two decimal places) obtained by the researcher to test this hypothesis?