Geneticists studied the occurrence of chromosomal non-disjunction during oogenesis in two different strains of yeast (Saccharomyces cerevisiae): Strain P and Strain Q.
The total number of non-disjunction errors recorded in each strain was:
The table below shows the percentage of these errors that occurred in the first meiotic division (MIMIMI) and the second meiotic division (MIIMIIMII).
| Strain | Total errors | Percentage of errors in MIMIMI (%) | Percentage of errors in MIIMIIMII (%) |
|---|---|---|---|
| Strain P | 480 | 85 | 15 |
| Strain Q | 920 | 40 | 60 |
A student concluded that there were more errors in MIMIMI in Strain Q than in Strain P because Strain Q had a significantly larger total number of errors.
Using the data in the table and suitable calculations, show why this conclusion is not valid.
