DP Biology (first assessment 2025)
Question 19N.2.SL.TZ0.1c
| Date | November 2019 | Marks available | [Maximum mark: 2] | Reference code | 19N.2.SL.TZ0.1c |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Compare and contrast | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
19N.2.SL.TZ0.1c
(c)
Compare and contrast the trends for O. rufipogon and O. sativa indica.
[2]
Markscheme
Similarities
both show diversity
OR
similar pattern/peaks and troughs in the first part of the chromosome / up to «approximately» 1.5 megabases
OR
similar diversity between 2.4 to 2.7 mb
OR
both highest at 0.7 mb ✔
Differences
there are «two» major drops in diversity for O. sativa indica whereas none for O. rufipogon/much wider fluctuations in O. s. indica
OR
O.s. indica much lower at PROG1
OR
O.rufipogon does not drop < 2.5 whereas O. s. indica approaches 0
OR
O.rufipogon generally higher than O. s. indica after 1.4-1.5 ✔
One answer from mpa and one from mpb required for 2 [max].
Accept a statement of where the drops occur.
