Name the meiosis stage in which single chromosomes are arranged on the equator.
Describe the sequence of events during anaphase I of meiosis.
Describe the way crossing over during meiosis increases genetic variation.
Explain how the data in Table 3.1 indicate that the two populations differ in their resistance to mesotrione.
Explain why this form of genetic variation is important for natural selection in water hemp populations.
A farmer can submit a leaf sample of water hemp from their fields to a laboratory to be checked for resistance to mesotrione or other herbicides. Suggest the advantage of this for the farmer.
Use the formula in Fig. 3.1 to work out the value of $t$. Show your method.
Use your calculated $t$ value to decide whether the null hypothesis should be accepted or rejected.